MSDS Sodium Hydroxide (NaOH) – Safety Data Sheet & GHS Hazards

Summary MSDS for Sodium Hydroxide (NaOH), CAS 1310-73-2: substance identity, GHS hazard classification, hazard and precautionary statements, and links to the manufacturer's official SDS.

Identity summary

Name	Sodium Hydroxide
Other names (IUPAC)	–
Molecular formula	NaOH
CAS number	1310-73-2
Molar mass	39.997 g/mol
PubChem CID	14798

Molar mass of NaOH and how to calculate it

The molar mass of NaOH is 40.00 g/mol, the sum of the relative atomic masses of all atoms in the formula: 22.990 + 15.999 + 1.008 = 40.00 g/mol.

Element	Atoms	Atomic mass	Contribution	Mass %
Na	1	22.990	22.99	57.48%
O	1	15.999	16.00	40.00%
H	1	1.008	1.01	2.52%

So 1 mol of NaOH weighs 40.00 g, and 1 L of a 0.1 M solution needs 4.000 g of pure NaOH. For liquid or concentrated reagents, work from assay and density with the dilution formula. Calculate other compounds with the molar mass calculator.

Hazard identification (GHS)

Signal word: DANGER

Pictograms:

Meaning of all GHS hazard symbols

Hazard statements (H)

• H314: Causes severe skin burns and eye damage.
• H370: Causes damage to organs.
• H402: Harmful to aquatic life.

Precautionary statements (P)

Prevention

• P273: Avoid release to the environment.
• P260: Do not breathe dust.
• P270: Do not eat, drink or smoke when using this product.
• P264: Wash skin thoroughly after handling.
• P280: Wear protective gloves/ protective clothing/ eye protection/ face protection.

Response

• P308 + P311: IF exposed or concerned: Call a POISON CENTER/doctor.
• P303 + P361 + P353: IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water.
• P301 + P330 + P331: IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
• P363: Wash contaminated clothing before reuse.
• P304 + P340 + P310: IF INHALED: Remove person to fresh air and keep comfortable for breathing. Immediately call a POISON CENTER/doctor.
• P305 + P351 + P338 + P310: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a POISON CENTER/doctor.

Storage

• P405: Store locked up.

Disposal

• P501: Dispose of contents/ container to an approved waste disposal plant.

The GHS classification above matches TCI (Tokyo Chemical Industry) official data for product O0575 Sodium Hydroxide (Granulated). Substance identity from PubChem CID 14798.

Download the official SDS & CoA

The applicable Safety Data Sheet is the manufacturer's SDS for the product and lot you purchase. For products available from AMI Scientific:

TCI O0575 – Sodium Hydroxide (Granulated)	Official SDS & CoA (TCI)
TCI O0575 – Sodium Hydroxide (Granulated)	View product
TCI S0542 – Sodium Hydroxide (1mol/L in Water)	Official SDS & CoA (TCI)View product
TCI S0543 – Sodium Hydroxide (2mol/L in Water)	Official SDS & CoA (TCI)View product
Sodium Hydroxide Pellets, CAS 1310-73-2, 1 kg – Smartlab A-2052	View product
Sodium Hydroxide Solution 0.05 N (0.05 M ), CAS 1310-73-2, 1 L – Smartlab A-2052H	View product
Sodium Hydroxide Solution 0.1 N (0.1 M), CAS 1310-73-2, 1 L – Smartlab A-2052A	View product
Sodium Hydroxide Solution 2.0 N (2.0 M), CAS 1310-73-2, 1 L – Smartlab A-2052G	View product

SDS and lot-specific CoA are sent with the quotation/order or on request.

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What is an MSDS/SDS?

An MSDS (Material Safety Data Sheet), now called an SDS (Safety Data Sheet), is a 16-section document describing the hazards, handling, storage, first aid, and disposal of a chemical. Read the full MSDS guide and other MSDS pages.

This summary was compiled by AMI Scientific from TCI official GHS data for information purposes. Classification may differ by concentration, form, and supplier. Always refer to the manufacturer's official SDS for the product and lot you use. Updated: 06-11-2026.