Safety data sheet reference · CAS 497-19-8

Sodium carbonate SDS

also: sodium carbonate MSDS · safety data sheet · Na2CO3 · CAS 497-19-8 · EC 207-838-8 · soda ash · washing soda

Warning Eye Irrit. 2

Exclamation Mark GHS07

Official PDF from supplier

Sigma-Aldrich ↗ Fisher Scientific ↗ Carl Roth ↗

This page is a reference, not the legal document.

CAS number

497-19-8

EC number

207-838-8

CLP Annex VI index

011-005-00-2

Molecular formula

CNa2O3

Structural formula

Na2CO3

Molar mass

105.988 g/mol

§ 02 · Hazards identification

Sodium carbonate harmonised EU classification

CLP Annex VI · Index 011-005-00-2. A supplier SDS may add self-classified hazards — this is the legal minimum.

H319 Causes serious eye irritation. Eye irritation — Category 2 (Eye Irrit. 2)

Precautionary statements

P264 Wash hands thoroughly after handling.

P280 Wear protective gloves, protective clothing, eye protection and face protection.

P305 IF IN EYES:

P313 Get medical advice or attention.

P337 If eye irritation persists:

P338 Remove contact lenses, if present and easy to do. Continue rinsing.

Codes ending in a colon introduce the action that follows — on a label they are printed as combined statements, such as P305+P351+P338.

§ 03 · Composition and identifiers

Sodium carbonate structure

Sodium carbonate is an ionic compound — there is no discrete Na2CO3 molecule. The diagram shows the ions the crystal lattice is built from.

Ions of sodium carbonate · Na2CO3

SMILES C(=O)([O-])[O-].[Na+].[Na+]

InChI InChI=1S/CH2O3.2Na/c2-1(3)4;;/h(H2,2,3,4);;/q;2*+1/p-2

InChIKey CDBYLPFSWZWCQE-UHFFFAOYSA-L

PubChem CID 10340 →

Identifiers from PubChem (NIH, public domain). Structure diagram drawn with RDKit from the SMILES string.

§ 07 · Handling and storage

Sodium carbonate computed storage compatibility

No storage segregation conflicts documented

Derived from CLP Annex VI classification and CAMEO reactive-group data — not copied from a PDF.

Full interactive verdict — reactions, gas release on contact, ADR forms →

§ 09 · Physical and chemical properties

Sodium carbonate physical properties

The full physical-property table (melting/boiling point, flash point, explosion limits, vapour pressure, density) is being populated for this substance from ECHA registration data and will appear here as it lands.

§ 13 · Disposal considerations

Dispose of waste and residues in accordance with local and national regulations — in the EU under the Waste Framework Directive 2008/98/EC. Never discharge to drains or municipal waste; hand contaminated packaging and unused product to an authorised waste-disposal company. The supplier's SDS section 13 lists the applicable waste codes for the specific product.

MSDS vs SDS

Sodium carbonate MSDS vs SDS: is there a difference?

MSDS (Material Safety Data Sheet) is the older name for the same document. In the US, OSHA's Hazard Communication Standard (2012) adopted the GHS-standardised 16-section Safety Data Sheet; in the EU the format is set by REACH Annex II. So a "sodium carbonate MSDS" and a "sodium carbonate SDS" refer to the same document — today it is issued as an SDS. Full breakdown of the differences →

Substance profile

What sodium carbonate is

Physical and chemical properties with the conditions each value was measured under, synonyms, formula and the harmonised CLP classification →

Compliance hub

From classification to SDS

The classification above corresponds to Section 2 of a Safety Data Sheet. Learn how a compliant 16-section SDS is structured and authored →

GHS label maker

Build the label for sodium carbonate

Pictograms, signal word and H-statements combined into a compliant label layout →

§ 16 · Sources

Classification: Regulation (EC) No 1272/2008 (CLP), Annex VI
Transport: UN ADR 2025 (UNECE), Table A
Reactivity: NOAA CAMEO Chemicals reactive-group matrix (public domain)
Physical properties: CAMEO Chemicals (NOAA, public domain) — per-value source references stored in the database
Substance data: PubChem · ECHA

Reference aid only. This page summarises the harmonised EU classification and computed storage guidance — it is not a Safety Data Sheet and does not replace one. Always verify hazards, handling and storage against the supplier's SDS (sections 7 and 10) and local regulations before use. Page updated 2026-08-11.

Frequently asked questions about sodium carbonate

Is an MSDS the same as an SDS?

In practice, yes. MSDS (Material Safety Data Sheet) is the older name for the same document. In the US, OSHA's Hazard Communication Standard (2012) adopted the GHS-standardised 16-section Safety Data Sheet; in the EU the SDS format is set by REACH Annex II. A document you find labelled "sodium carbonate MSDS" is today issued as an SDS.

What GHS pictograms does sodium carbonate require?

Under the harmonised EU classification (CLP Annex VI), sodium carbonate carries GHS07 with the signal word "Warning". Hazard statements: H319. A supplier's SDS may add self-classified hazards on top of this harmonised minimum.

Where can I download an official sodium carbonate SDS PDF?

From your own supplier — an SDS is issued per product and supplier, so the correct PDF for an inspection is the one matching the product you actually purchased. The supplier links on this page lead to the official SDS libraries of major distributors.