Supplier of Caustic Soda (Sodium Hydroxide 98-99%) from Turkey and Dubai-UAE
- Supplier of Caustic Soda (Sodium Hydroxide 98-99%) from Turkey and Dubai-UAE
- Quick Answer
- What Is Caustic Soda? — NaOH, Lye & Sodium Hydroxide Explained
- Three Grades of Caustic Soda — Which One Fits Your Process?
- TDS & Specifications — Flakes, Pearls & Liquid
- How Is Caustic Soda Made?
- Industrial Uses of Caustic Soda — Sector by Sector
- Packaging Options, Storage & Shelf Life
- Global Logistics & Export Terms for Caustic Soda
- Caustic Soda Price — How It Is Quoted & What Drives It
- Get a Firm Caustic Soda Quote — Within 24 Hours
- Why Source Caustic Soda From SUHA International?
- Ordering Caustic Soda — Five Steps to First Delivery
- Safe Handling & Compliance — Sodium Hydroxide (NaOH)
- Speak With Our
Export Team - FAQ — Caustic Soda (Sodium Hydroxide NaOH)
Caustic Soda — Bulk NaOH Flakes,
Pearls & Liquid for Global Industry
High-purity caustic soda exported from ISO-certified plants in Turkey and our Dubai hub. Three grades — flakes 98–99%, pearls 99%, liquid 32–50% — shipped to industrial buyers worldwide with a Certificate of Analysis on every lot and a firm FOB/CIF price in 24 hours.
Quick Answer
Caustic soda is the common trade name for sodium hydroxide (NaOH), a strong inorganic alkali (CAS 1310-73-2) made by the chlor-alkali electrolysis of brine. SUHA International exports it in three forms — flakes at 98–99%, pearls at 99% and liquid at 32–50% — from ISO-certified plants in Turkey and the UAE, with a Certificate of Analysis on every lot and a firm FOB/CIF quote within 24 hours.
- Chemical: NaOH (sodium hydroxide)
- CAS: 1310-73-2
- HS Code: 2815.11 / 2815.12
- UN No.: 1823 (solid) / 1824 (liquid)
- Hazard: Class 8 — Corrosive
- MOQ: 24 MT (one 20′ FCL)
What Is Caustic Soda? — NaOH, Lye & Sodium Hydroxide Explained
Caustic soda — chemically sodium hydroxide (NaOH) — is one of the most widely produced inorganic alkalis in the world. Also traded as lye, white caustic, sodium hydrate and, in older literature, caustic alkali, it is produced on an industrial scale by the electrolysis of brine (sodium chloride solution) in the chlor-alkali process.
Pure sodium hydroxide is a white, odourless solid with a strongly alkaline character (pH ~13–14 in solution). It dissolves readily in water with a highly exothermic reaction, making it easy to dose and dilute — but it also means that safe handling protocols are non-negotiable. Its powerful reactivity toward fats, oils, proteins and many metals makes caustic soda indispensable across metallurgy, pulp and paper, petrochemicals, water treatment, food processing, textiles, and soap and detergent manufacture.
Commercially, caustic soda is available in three principal forms: white solid flakes at 98–99% NaOH, low-dust micropearls at 99% NaOH, and aqueous liquid solution at 32%, 46%, 48% or 50% NaOH by mass. SUHA International supplies all three grades from dual origins — ISO-certified production facilities in Turkey and our UAE export hub — giving bulk buyers supply-chain redundancy without managing multiple vendor relationships.
Chemical Identity & Classification — Sodium Hydroxide (Caustic Soda)
| Parameter | Data | Notes / Regulatory Ref. |
|---|---|---|
| IUPAC Name | Sodium Hydroxide | — |
| Trade Names | Caustic Soda · Lye · White Caustic · Sodium Hydrate | All refer to NaOH |
| Chemical Formula | NaOH | Mol. weight: 39.997 g/mol |
| CAS Number | 1310-73-2 | EINECS: 215-185-5 |
| Available Grades | Flakes 98–99% · Pearls 99% · Liquid 32–50% | COA per production lot |
| Appearance | White opaque solid (flakes/pearls) / colourless to pale yellow liquid | — |
| Melting Point | 318°C (604°F) | Solid NaOH |
| Boiling Point | 1,388°C (2,530°F) | Solid NaOH |
| Density | 2.13 g/cm³ (solid) / 1.50 g/cm³ (50% soln.) | At 20°C |
| Solubility in Water | Highly soluble (111 g / 100 mL at 20°C) | Exothermic dissolution |
| pH (1% solution) | ~13–14 | Strongly alkaline |
| HS Code | 2815.11 (solid) / 2815.12 (liquid solution) | Export classification |
| UN Number | UN 1823 (solid) / UN 1824 (solution) | Dangerous goods |
| Hazard Class | 8 — Corrosive | IMDG Code / ADR |
| GHS Pictograms | GHS05 (Corrosion) · GHS07 (Health hazard) | EU CLP EC 1272/2008 |
| Shelf Life | ~24 months (solid) / ~12 months (liquid) | Sealed, dry storage |
| E-Number (food) | E 524 | Permitted food additive |
Three Grades of Caustic Soda — Which One Fits Your Process?
Not all caustic soda is interchangeable. The right grade reduces handling cost, dosing errors and off-spec risk. Use the guide below or call our technical desk — we'll recommend the correct form for your application before you commit to an order. See the full types and grades of caustic soda guide.
Caustic Soda Flakes
- Standard export grade, most competitively priced
- White, free-flowing irregular chips (0.3–1 cm³)
- Low chlorides (NaCl ≤ 0.009%), low iron (Fe ≤ 10 ppm)
- Aluminium, non-ferrous metallurgy, Bayer process
- Soap & detergent saponification
- Textile mercerization & pulp digestion
- 25 kg bags, 500–1,000 kg jumbo bags (FIBC)
Caustic Soda Pearls
- Micropearl form — virtually dust-free, superior flowability
- 99.0% purity min; Na₂CO₃ ≤ 0.8%; NaCl ≤ 0.05%
- Precise, repeatable volumetric dosing
- Cosmetics & personal-care formulation
- Pharmaceutical and specialty chemistry
- Food-grade option (E524) for CIP and food processing
- 25 kg PP bags, palletized with PE liner
Liquid Caustic Soda
- Ready-to-use — no dissolving, no dust exposure
- 50% NaOH: purity ≥ 48%, Fe ≤ 10 ppm, Hg ≤ 0.1 ppm
- Membrane-cell grade available (ultra-low mercury)
- Water & wastewater pH adjustment
- Petrochemical caustic washing & desulfurization
- Pulp & paper alkaline extraction
- IBC 1,000 L, HDPE drums 200 L, road tanker, ISO tank
TDS & Specifications — Flakes, Pearls & Liquid
Representative analytical data for each grade is shown below. A signed Certificate of Analysis for your specific production lot is issued with every shipment. Full TDS PDFs are available before you order — request via the contact form or WhatsApp.
Caustic Soda Flakes — Technical Data Sheet
98–99% NaOH| Parameter | Test Result | Unit | Limit / Notes |
|---|---|---|---|
| NaOH Purity | 98.0 ± 1 | % w/w | Min 97.0 |
| Sodium Carbonate (Na₂CO₃) | 0.43 | % w/w | Max 1.0 |
| Sodium Chloride (NaCl) | 0.0085 | % w/w | Max 0.02 |
| Sodium Sulfate (Na₂SO₄) | 0.0047 | % w/w | Max 0.01 |
| Silicon Dioxide (SiO₂) | 0.0019 | % w/w | Max 0.005 |
| Iron (Fe) | 10 | ppm | Max 15 |
| Aluminium Oxide (Al₂O₃) | Max 3 | ppm | Max 5 |
| Heavy Metals as Pb | Max 2 | ppm | Max 5 |
| Insoluble in Water | 0 | % w/w | Nil |
| Shape / Size | Irregular chips | 0.3–1 cm³ | White, free-flowing |
Caustic Soda Pearls — Technical Data Sheet
99% NaOH| Physical Property | Value | Unit |
|---|---|---|
| Melting Point | 320–325 | °C |
| Boiling Point | 1,385–1,390 | °C |
| Density at 20°C | 2.13 | g/cm³ |
| Dissolution Rate (100 g in 100 mL H₂O, 25°C) | 22 | seconds |
| Heat Capacity at 25°C | 2.01 | J/g·K |
| Standard Heat of Formation at 25°C | 10.67 | kJ/g |
| Chemical Parameter | Specification | Unit |
|---|---|---|
| NaOH Purity | 99.0 min | % w/w |
| Sodium Carbonate (Na₂CO₃) | 0.8 max | % w/w |
| Sodium Chloride (NaCl) | 0.05 max | % w/w |
| Iron Oxide (Fe₂O₃) | 50 max | ppm |
Liquid Caustic Soda — Technical Data Sheet (50% Grade)
50% NaOH| No. | Parameter | Unit | Acceptance Limit | COA Result | Method |
|---|---|---|---|---|---|
| 1 | NaOH Purity | % mass | Min 48 | 50 | ISIRI-6135 |
| 2 | Sodium Carbonate (Na₂CO₃) | % mass | Max 0.5 | 0.2 | ISIRI-6135 |
| 3 | Sodium Chloride (NaCl) | % mass | Max 0.03 | 0.01 | ISIRI-6135 |
| 4 | Sodium Sulfate (Na₂SO₄) | % mass | Max 0.007 | 0.001 | ISIRI-6135 |
| 5 | Silicon Dioxide (SiO₂) | % mass | Max 0.01 | 0.001 | ISIRI-6135 |
| 6 | Iron (Fe) | ppm | Max 10 | 3 | ISIRI-6135 |
| 7 | Aluminium Oxide (Al₂O₃) | ppm | Max 10 | <1 | ISIRI-6135 |
| 8 | Mercury (Hg) | ppm | Max 0.1 | 0.01 | ISIRI-6135 |
| 9 | Arsenic Oxide (As₂O₃) | ppm | Max 1 | <0.02 | ISIRI-6135 |
How Is Caustic Soda Made?
Understanding the production method matters for procurement: it determines purity, mercury content, and suitability for food-grade or pharmaceutical applications. See the full technical guide on how caustic soda is made.
All commercial sodium hydroxide (NaOH) is produced by the electrolysis of saturated brine — sodium chloride (NaCl) dissolved in water — in what the industry calls the chlor-alkali process. The three commercial technologies differ in how they separate the NaOH product from the co-produced chlorine gas:
- Membrane cell (dominant technology): A semi-permeable ion-exchange membrane separates the anode and cathode compartments. Produces high-purity NaOH with low chloride and minimal mercury contamination. The cleanest available grade — preferred for food, pharma and high-purity chemical applications.
- Diaphragm cell: An asbestos or synthetic diaphragm separates the compartments. Produces NaOH at lower initial concentration and with higher chloride levels. Lower capex but higher energy cost and more impurities than membrane.
- Mercury cell (being phased out): Produces very pure NaOH via sodium amalgam, but requires strict mercury management. Banned or scheduled for closure across the EU and most OECD markets.
After electrolysis, liquid NaOH solution is evaporated and concentrated to the required grade (32–50%). For solid flake and pearl production, the concentrated liquid is further evaporated to near-anhydrous state and processed through flaking or prilling/spheronization equipment. SUHA International sources only from membrane-cell and diaphragm-cell producers, ensuring all shipments meet EU mercury limits for caustic soda.
Industrial Uses of Caustic Soda — Sector by Sector
Caustic soda is among the top five highest-volume industrial chemicals globally. Below is how it functions in each major sector — with dedicated guides for technical buyers and procurement engineers.
Metallurgy, Mining & Aluminium
The Bayer process digests bauxite ore with hot sodium hydroxide solution to dissolve alumina, which is then precipitated as Al(OH)₃ and calcined to alumina (Al₂O₃). Also used in base-metal hydrometallurgy, flotation pH control, surface etching and effluent neutralization. Caustic soda in metal processing →
Water & Wastewater Treatment
NaOH is the preferred reagent for pH elevation, water softening, and precipitation of heavy metals as hydroxides in both drinking-water and municipal/industrial effluent treatment. Liquid grade at 32–50% is easiest to dose in continuous systems. Caustic soda for water treatment →
Pulp & Paper
In the kraft process, white liquor (NaOH + Na₂S) cooks wood chips to dissolve lignin, leaving cellulose fibres. NaOH is also used in alkaline extraction stages of bleaching (E stage) and in deinking of recycled fibre for OCC and DIP mills. Caustic soda in pulp & paper →
Petrochemicals & Refining
Caustic washing removes acidic impurities (H₂S, mercaptans) from LPG, naphtha and natural gas. Also used in ethylene oxide/ethylene glycol production, biodiesel transesterification (as catalyst) and neutralization of acidic refinery streams. Caustic soda in petroleum →
Soaps & Detergents
Saponification of vegetable oils and animal fats with NaOH produces solid sodium soap. For liquid detergents, NaOH neutralizes linear alkylbenzene sulfonic acid (LAS) and other acid-form surfactants. Flakes and pearls are preferred for batch soap production. Caustic soda in soap & detergent →
Textiles
Mercerization — treatment of cotton yarn or fabric with concentrated NaOH solution — increases tensile strength, lustre and dye uptake. Also used in scouring to remove natural waxes and impurities before dyeing. Flakes 98–99% are the standard grade. Caustic soda for textiles →
Food Processing
Food-grade sodium hydroxide (E524) is approved for pretzel and baked-goods lye baths, olive curing, cocoa alkalization (Dutching), noodle making, and CIP (Clean-in-Place) cleaning of food processing equipment. Food-grade pearls or membrane-grade liquid required. Food-grade pearls →
Chemical Synthesis & Pharma
NaOH is a key reagent in pH control, neutralization, ester/amide hydrolysis and basic catalysis across organic and inorganic chemical synthesis. Pharmaceutical-grade caustic soda requires membrane-cell origin and certified low-mercury analysis. Full product overview →
Application Matrix — Industry · NaOH Function · Recommended Grade
| Industry | Key Function of NaOH | Recommended Grade | Typical Concentration |
|---|---|---|---|
| Aluminium / Mining | Bayer process digestion, pH control | Flakes 98–99% | 20–30% w/w solution |
| Water Treatment | pH elevation, softening, metal precipitation | Liquid 32–50% | As received or diluted |
| Pulp & Paper | Kraft cooking, alkaline extraction, deinking | Liquid / Flakes | White liquor ~100 g/L |
| Petrochemicals | Caustic washing, desulfurization, biodiesel | Liquid 32–50% | 10–20% w/w |
| Soap & Detergent | Saponification, surfactant neutralization | Flakes / Pearls | Neat solid or 30–50% |
| Textiles | Cotton mercerization, scouring | Flakes 98–99% | 200–300 g/L |
| Food Processing | Lye baths, CIP, cocoa alkalization | Food-grade pearls / liquid | 1–5% food use; ~2% CIP |
| Chemical Synthesis | pH adjustment, neutralization, reagent | Pearls 99% / Liquid | Application-specific |
Packaging Options, Storage & Shelf Life
Proper packaging is the first line of defence for NaOH quality in transit. Every shipment of caustic soda from SUHA International uses moisture-resistant, IMDG-compliant packaging with batch ID, manufacturing date and shelf-life label on every unit.
| Grade | Packaging Format | Net Weight | Container Load (approx.) |
|---|---|---|---|
| Flakes / Pearls | PP woven bag with PE inner liner | 25 kg | ~800 bags / 20 FCL |
| Flakes / Pearls | Jumbo bag (FIBC), palletized | 500–1,000 kg | 20–25 jumbo bags / 20 FCL |
| Liquid NaOH | HDPE drum | 200–220 L | ~80 drums / 20 FCL |
| Liquid NaOH | IBC (Intermediate Bulk Container) | 1,000 L | ~20 IBCs / 20 FCL |
| Liquid NaOH | Road tanker (rubber/HDPE lined) | 20–30 MT | Full truck / direct delivery |
| Liquid NaOH | ISO tank container | 20–23 MT | 1 ISO tank = 1 × 20' FCL |
Shelf life: Caustic soda flakes and pearls are stable for approximately 24 months from the production date when stored sealed in original packaging in a cool (≤30°C), dry, ventilated warehouse away from moisture, CO₂ and acids. Liquid NaOH solution has a shelf life of approximately 12 months in sealed HDPE or stainless-steel containers. Sodium hydroxide slowly absorbs CO₂ from air to form sodium carbonate, so keep containers sealed at all times outside active use. Full guidance: how to store caustic soda safely.
Concentration-temperature note for liquid grade: High-concentration NaOH solution (50%) begins to crystallize around 12°C. Storage tanks and lines handling 48–50% liquid in cold climates should be trace-heated or maintained above 15°C to prevent blockages.
Global Logistics & Export Terms for Caustic Soda
SUHA International exports caustic soda from two origins — Turkey and UAE — giving buyers access to the fastest shipping lane for their destination and a built-in contingency if one corridor is disrupted.
| Parameter | Details |
|---|---|
| Loading Ports — Turkey | Mersin · Izmir · Istanbul · Derince · Samsun |
| Loading Ports — UAE | Jebel Ali (Dubai) · Khalifa Port (Abu Dhabi) |
| Incoterms Available | FOB · CFR · CIF · CPT · DAP · DDP |
| Destination Regions | Europe · Balkans · Middle East · Africa · Asia · Americas |
| Container Types | 20′ FCL (dry for solids) · 20′ ISO tank (liquid) · FTL road tanker |
| Transit Times (approx.) | 5–7 days to SE Europe · 10–14 days Mediterranean · 20–28 days Far East |
| MOQ — Packed | 24 MT — one 20′ FCL of flakes or pearls (sample quantities on request) |
| MOQ — Bulk Liquid | 24 MT — one ISO tank container or road tanker |
| Payment Terms | T/T in advance · T/T against documents · L/C at sight · D/P |
| Dangerous Goods | IMDG Class 8 — UN 1823 (solid) / UN 1824 (liquid) — full DG docs included |
Caustic Soda Price — How It Is Quoted & What Drives It
Caustic soda is priced in USD per metric tonne (USD/MT) and fluctuates with energy costs, chlorine-PVC market dynamics, feedstock brine availability and freight. For a live indicative price or a firm export quote, see the caustic soda price page.
| Price Driver | Direction of Influence | Notes |
|---|---|---|
| Energy costs (electricity) | High energy cost → higher NaOH price | Electrolysis is energy-intensive |
| Chlorine market demand | High chlorine demand → lower NaOH price | Co-product economics |
| Aluminium & PVC production | High demand → higher NaOH price | Largest downstream sectors |
| Freight rates | High freight → higher CIF/CFR price | Container and bulk rates vary by route |
| Grade (liquid vs. flakes) | Flakes typically priced higher than liquid | Extra evaporation / processing cost |
| Volume (MT per order) | Larger volumes → lower unit price | FCL and tanker economies of scale |
| Incoterm | DDP > CIF > CFR > FOB | More service = higher inclusive price |
Get a Firm Caustic Soda Quote — Within 24 Hours
Tell us your grade, volume, delivery point and Incoterm. Our export desk returns a bankable FOB or CIF offer with unit price, container value, payment terms and shipping schedule. No ballpark figures — a number you can take to budget approval.
Why Source Caustic Soda From SUHA International?
Procurement managers don't worry about price lists — they worry about stockouts, off-spec batches and documentation failures at customs. SUHA International is structured to remove exactly those risks.
Ordering Caustic Soda — Five Steps to First Delivery
Send Your Inquiry
Specify grade (flakes/pearls/liquid), purity, estimated volume (MT per order and/or per year), delivery point, packaging format and preferred Incoterm. Use the contact form, WhatsApp (+971 50 720 9246) or email (info@causticsodaco.com).
Receive a Firm Export Quote (≤ 24 h)
A written offer covering unit price (USD/MT), total container value, payment terms, loading port, available shipment dates and transit time estimate. Not a ballpark — a number you can act on.
Confirm Order & Terms
MOQ: 24 MT (metric tonnes) — one 20-foot FCL for packed goods or one ISO tank for bulk liquid. Sign the proforma invoice (PI) and arrange payment — T/T, L/C at sight or D/P. We confirm the production slot or available stock immediately.
Quality Control & Pre-Shipment Documentation
In-house QC and COA per lot. Full export document pack issued: COA, SDS, Commercial Invoice, Packing List, Bill of Lading, Certificate of Origin. Third-party inspection (SGS, Bureau Veritas, Intertek) available on request at buyer's cost.
Shipment & On-Time Delivery
Cargo loaded and vessel/truck booked. Shipment tracking and B/L copy shared on departure. Lead times from stock: packed goods 5–10 days; bulk liquid 7–14 days (sea freight); subject to destination port and routing.
Safe Handling & Compliance — Sodium Hydroxide (NaOH)
Caustic soda is a strong corrosive alkali. Every shipment includes a full SDS/MSDS prepared to GHS/CLP standards. See the authoritative hazard data at PubChem — Sodium Hydroxide and regulatory guidance at the European Chemicals Agency (ECHA).
Hazard Classification
GHS05 Corrosion (severe skin burns, serious eye damage — Cat. 1) and GHS07. UN 1823 (solid) / UN 1824 (solution), IMDG / ADR Hazard Class 8. Store away from acids, oxidizers and aluminium metal.
Required PPE
Chemical-resistant gloves (nitrile or neoprene), splash-proof goggles (not just safety glasses), full face shield, chemical apron/suit, and acid/alkali-resistant boots. Emergency eyewash station and safety shower within 10 seconds' travel of handling area — mandatory.
Storage Requirements
Cool (≤30°C), dry, well-ventilated warehouse. Keep containers sealed to prevent CO₂ absorption and moisture ingress. Segregate from acids, organic materials and reactive metals. Floors should be acid/alkali-resistant with bunded secondary containment.
Regulatory Framework
EU CLP Regulation EC 1272/2008; REACH (Regulation EC 1907/2006); IMO IMDG Code (sea transport); ADR (road transport — Europe). Serbian chemical legislation aligned with EU standards since EU association framework.
Speak With Our
Export Team
We respond to caustic soda export inquiries within 24 business hours — usually the same day. For urgent or large-volume requirements, WhatsApp is the fastest channel.
Include These Details for the Fastest Quote
FAQ — Caustic Soda (Sodium Hydroxide NaOH)
What is caustic soda and what is its chemical name?
Caustic soda is the industrial trade name for sodium hydroxide (NaOH), CAS number 1310-73-2. It is also known as lye, sodium hydrate and white caustic. It is a strong inorganic alkali produced by the chlor-alkali electrolysis of brine, available commercially as solid flakes, micropearls and aqueous liquid solution.
What grades of caustic soda does SUHA International supply?
We supply three commercial grades: caustic soda flakes at 98–99% NaOH (most widely traded, suitable for metallurgy, textiles and soap); caustic soda pearls at 99% NaOH (low-dust micropearls, preferred for food-grade and precision dosing); and liquid caustic soda at 32%, 46%, 48% and 50% NaOH (ready-to-dose for water treatment and petrochemicals). A Certificate of Analysis (COA) ships with every production lot.
What is the difference between caustic soda flakes and pearls?
Both are solid sodium hydroxide at ≥98% purity, but differ in form. Flakes are irregular thin chips (0.3–1 cm²) produced by scraping a cooled NaOH film — they are the standard export grade and most cost-effective. Pearls are uniform spherical micropearls produced by prilling — virtually dust-free, with excellent flowability and consistent dissolution rate. Pearls are preferred for automated dosing systems, pharmaceutical, cosmetic and food-grade applications where dust minimization matters.
What is the HS Code and UN number for caustic soda?
Caustic soda (NaOH) is classified under HS Code 2815.11 for solid grades (flakes and pearls) and HS Code 2815.12 for aqueous liquid solution. For dangerous-goods transport, solid NaOH is classified as UN 1823 and liquid solution as UN 1824, both under IMDG / ADR Hazard Class 8 — Corrosive.
What is the minimum order quantity (MOQ) for bulk caustic soda export?
The minimum order quantity (MOQ) is 24 MT (metric tonnes). For packed solid grades (25 kg bags or jumbo bags) this is one 20-foot full container load (FCL); for bulk liquid NaOH it is one ISO tank container or road tanker. Smaller sample quantities (from one pallet) can be arranged on request for qualification before a commercial order.
How is caustic soda produced?
Caustic soda is produced industrially by electrolysis of saturated brine (NaCl solution) in the chlor-alkali process — co-producing chlorine gas and hydrogen. The three commercial technologies are the membrane cell (cleanest grade, dominant globally), the diaphragm cell (older, higher impurities) and the mercury cell (being phased out due to environmental regulations). SUHA International sources exclusively from membrane-cell and diaphragm-cell producers.
What documents are included with each caustic soda shipment?
Every export shipment includes: Certificate of Analysis (COA) for the specific production lot; Safety Data Sheet (SDS/MSDS) to GHS/CLP standards; Commercial Invoice; Packing List; Bill of Lading (B/L) or CMR/AWB; Certificate of Origin (CO); and IMDG Class 8 dangerous-goods documentation for sea freight. Third-party inspection reports (SGS, BV, Intertek) can be added on request.
What is the shelf life of caustic soda and how should it be stored?
Caustic soda flakes and pearls have a shelf life of approximately 24 months when stored sealed in original packaging in a cool (≤30°C), dry, well-ventilated area away from CO₂, moisture and acids. Liquid NaOH solution is stable for approximately 12 months in sealed HDPE or steel containers. Material that still meets specification on reanalysis may be used beyond these dates.
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