We unleash your business potential by maximize the business innovation.
Send EmailSodium Hydroxide, Caustic Soda, Caustic Soda Flake, Caustic Soda Pearl, Sodium Hydroxide Pellet, E524, 1310-73-2
🧪 Caustic Soda Flake – Technical Specification Sheet
Chemical Name: Sodium Hydroxide
Molecular Formula: NaOH
Molecular Weight: 39.997 g/mol
CAS Number: 1310-73-2
EC Number: 215-185-5
UN Number: UN1823 – Sodium Hydroxide, Solid
Appearance: White orthorhombic flakes
Odor: Odorless
Purity: ≥ 99% (Technical Grade)
🔁 Synonyms / Alternative Names
-
Sodium Hydroxide
-
Caustic Soda
-
Sodium Hydrate
-
Caustic Soda Flake
-
Caustic Soda Solution
-
NaOH
-
E524 (Food Additive Code)
-
CAS No: 1310-73-2
⚙️ Physical and Chemical Properties
| Property | Value |
|---|---|
| Appearance | White flaky solid |
| Density | 2.13 g/cm³ at 25 °C |
| Boiling Point | 1388 °C |
| Solubility in Water | Freely soluble; ~109 g/100 mL at 20 °C |
| Solubility in Ethanol | Freely soluble |
| Hygroscopicity | Strongly hygroscopic; absorbs CO₂ from air forming sodium carbonate |
| Corrosiveness | Highly corrosive to skin and metals |
| Flammability | Non-flammable |
| Decomposition | Emits toxic fumes when heated |
⚠️ Safety Notes
-
Irritant: Causes severe burns upon contact with skin or eyes.
-
Toxicity: Classified as a hazardous chemical; handle with appropriate PPE.
-
ADR Classification:
Caustic soda (sodium hydroxide) is available in various grades, each suited for different applications. Here are the main types:
-
Technical Grade: Used in industrial applications such as chemical manufacturing, water treatment, and petroleum refining.
-
Food Grade: Meets the purity standards required for use in food processing and preparation.
-
Pharmaceutical Grade: Meets the stringent purity standards required for use in pharmaceutical manufacturing.
-
Reagent Grade: High purity, used in laboratory settings for analytical and research purposes.
🧪 Sodium Hydroxide – Alternative Names and Forms (English)
| Category | Name / Term | Description |
|---|---|---|
| Chemical Name | Sodium Hydroxide | Official IUPAC name; used in COA, SDS, and regulatory documents. |
| Abbreviation | NaOH | Common chemical shorthand; appears on packaging and technical sheets. |
| CAS Number | CAS No: 1310-73-2 | Globally recognized identifier for sodium hydroxide. |
| UN Code | UN1823 – Sodium Hydroxide, Solid | Used in ADR transport and hazardous goods classification. |
| General Trade Name | Caustic Soda | Widely used commercial name across industries. |
| Pearl Form Names | Caustic Soda Pearls<br>Pearl Caustic Soda<br>Sodium Hydroxide Pearls<br>NaOH Pearls | Refers to spherical granules; used in detergents, textiles, food, and chemicals. |
| Flake Form Names | Caustic Soda Flakes<br>Flake Caustic Soda<br>Sodium Hydroxide Flakes<br>NaOH Flakes | Refers to flat crystalline form; common in industrial cleaning, pulp & paper, and water treatment. |
| Liquid Form Names | Caustic Soda Solution<br>Liquid Caustic Soda<br>Sodium Hydroxide Solution | Aqueous form; typically 30–50% concentration. |
| Food Grade Name | E524 – Sodium Hydroxide | EU food additive code; used for pH regulation and peeling in food processing. |
| Pharma Grade Name | Sodium Hydroxide – Pharma Grade | High purity form for pharmaceutical applications; GMP-compliant. |
| Low Iron Grade | Sodium Hydroxide – Low Iron | Used in electronics and high-purity chemical processes. |
| Micro Pearl / Fine Grade | Sodium Hydroxide Micro Pearls | Smaller granule size; faster dissolution in sensitive processes. |
🧪 Caustic Soda Pearls – Applications
| Industry | Application Details |
|---|---|
| Textile | pH adjustment before dyeing, mercerization, cellulose dissolution |
| Detergents & Cleaning | Industrial degreasers, soap production, surface cleaners |
| Food Processing | As additive E524; olive curing, starch modification, pH control |
| Pulp & Paper | Kraft pulping, lignin removal, fiber separation |
| Water Treatment | pH elevation, heavy metal precipitation, flocculation aid |
| Petrochemicals | Acid neutralization, catalyst preparation, refining processes |
| Pharmaceuticals & Cosmetics | pH regulator, active ingredient solubilizer, GMP-compliant production |
| Metallurgy | Aluminum extraction, surface cleaning, pre-treatment for plating |
| Electronics & Semiconductors | Ultra-pure grade for wafer cleaning, surface preparation |
