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Home > Products > Inorganic Chemicals > Sodium Hydroxide > Sodium hydroxide

Sodium hydroxide

Name: Sodium hydroxide
SKU: 0

Basic Information

CAS No.: 1310-73-2
Molecular Formula: NaOH
Molecular weight: 40.00

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Product Details

Sodium Hydroxide (NaOH) is a strong alkaline chemical widely used across chemical manufacturing, pulp and paper, textiles, petroleum refining, water treatment, detergents and metal processing. Its strong alkalinity makes it an important raw material and processing agent for pH adjustment, neutralization, cleaning and chemical synthesis.

Chemical Properties

Item	Specification
Chemical Name	Sodium Hydroxide
CAS No.	1310-73-2
EC No.	215-185-5
Abbreviation	NaOH
Synonyms	Caustic Soda; Lye; Sodium Hydrate
Chemical Formula	NaOH
Molecular Weight	40.00 g/mol
Chemical Class	Inorganic Chemical
Chemical Type	Strong Alkali / Inorganic Base
Appearance	White to almost-white solid, flakes, pellets or granules
Odor	Odorless
Density	Approx. 2.13 g/cm³
Melting Point	Approx. 318°C
Boiling Point	Approx. 1,388–1,390°C
Water Solubility	Highly soluble in water
Hygroscopicity	Hygroscopic; readily absorbs moisture from air
pH	Strongly alkaline in aqueous solution
Physical State	Solid at room temperature
Main Chemical Function	Strong alkaline agent, pH regulator and chemical processing agent
Main Applications	Chemical manufacturing, pulp and paper, textiles, petroleum refining, water treatment, detergents and metal processing

Safety Information

Item	Safety Information
Hazard Classification	Corrosive to Metals; Skin Corrosion; Serious Eye Damage
Signal Word	Danger
GHS Pictogram	GHS05 – Corrosive
H290	May be corrosive to metals
H314	Causes severe skin burns and eye damage
Inhalation Hazard	Avoid breathing dust, mist or aerosols. Exposure may cause severe irritation or burns to the respiratory tract.
Skin Contact	Causes severe skin burns. Avoid direct contact with solid sodium hydroxide and concentrated solutions.
Eye Contact	Causes serious eye damage and may result in permanent eye injury.
Ingestion Hazard	Harmful if swallowed and may cause severe burns to the mouth, throat and digestive tract.
Water Reaction	Dissolving sodium hydroxide in water generates substantial heat. Add sodium hydroxide carefully and follow established dilution procedures.
Handling	Handle with adequate ventilation. Avoid contact with skin, eyes and clothing. Avoid generating dust.
Personal Protection	Chemical-resistant gloves, protective clothing, safety goggles and/or face protection.
Storage	Keep tightly closed in a cool, dry and well-ventilated area. Protect from moisture and incompatible materials.
Moisture Sensitivity	Hygroscopic and readily absorbs moisture from air. Keep containers tightly sealed.
Incompatible Materials	Avoid strong acids and incompatible metals/materials as specified in the applicable SDS.
Environmental Precaution	Avoid uncontrolled release into drains, soil and water.
Emergency – Skin Contact	Immediately remove contaminated clothing and rinse the affected area thoroughly with plenty of water. Seek medical attention for significant exposure.
Emergency – Eye Contact	Immediately rinse cautiously with plenty of water and obtain urgent medical attention.
Emergency – Ingestion	Rinse mouth. Do not induce vomiting. Seek immediate medical attention.
Safety Documentation	Always refer to the latest supplier SDS and applicable local regulations before handling, storage or transportation.

Product Applications

01 — Chemical Manufacturing

Sodium hydroxide is widely used as a basic raw material and processing agent in the production of various sodium salts, chemicals and intermediates.

02 — Pulp & Paper

NaOH is used in pulp processing and chemical treatment during paper manufacturing, helping separate and process lignin and other components of wood.

03 — Water Treatment

Sodium hydroxide is used for pH adjustment, acid neutralization and alkalinity control in industrial and municipal water treatment processes.

04 — Petroleum Refining

NaOH is used in petroleum refining and processing applications, including the treatment of acidic components and certain petroleum products.

05 — Soap & Detergents

Sodium hydroxide is widely used in the saponification of fats and oils to manufacture soaps and other cleaning products.

06 — Textile Processing

NaOH is used in textile processing, including cotton treatment, mercerization and other alkaline processing operations.

07 — Alumina Production

Sodium hydroxide is an important processing chemical in the Bayer process for extracting alumina from bauxite.

08 — Metal Processing

NaOH is used in metal cleaning, surface treatment, oxide removal and various industrial metal-processing operations.

09 — Chemical Cleaning

Its strong alkaline properties make sodium hydroxide suitable for industrial cleaning and degreasing applications, including certain equipment and process systems.

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A1: Our products fully comply with international standards such as REACH, MSDS, and COA, and we strictly implement the ISO9001 quality management system. We can also provide third-party testing reports (SGS, BV, etc.) according to customer needs.

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