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Description

Soda Ash · CAS 497-19-8 · Na2CO3. UNII 45P3261C7T. Melting Point: 856 °C; Melting Point: 851 °C; Density: 2.54 g/cu cm.

Identification

CAS Registry Number	497-19-8
PubChem CID	10340
Molecular formula	Na2CO3
IUPAC name	disodium;carbonate
UNII (FDA)	45P3261C7T

Computed Descriptors

Molecular Weight	105.988
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	3
Rotatable Bond Count	0
Exact Mass	105.96428242
Monoisotopic Mass	105.96428242
Topological Polar Surface Area	63.2
Heavy Atom Count	6
Formal Charge	0
Complexity	18.8

Physical & Chemical Properties

Melting Point	856 °C
Melting Point	851 °C
Density	2.54 g/cu cm
Density	Bulk density: 0.59-1.04 g/mL
Density	2.5 g/cm³
Density	2.509 @ 0°C
Decomposition	>400 °C

Physical description & handling notes

• Dry Powder; Other Solid; Large Crystals; CBI; Dry Powder; Large Crystals; Liquid; Wet Solid; Other Solid; Liquid; Dry Powder; Liquid; Liquid; Other Solid
• Colourless crystals or white, granular or crystalline powder; The anhydrous form is hygroscopic, the decahydrate efflorescent
• White or grayish-white odorless solid; Hygroscopic; [HSDB] White hygroscopic powder; [Sigma-Aldrich MSDS]
• WHITE HYGROSCOPIC POWDER.
• Grayish-white powder or lumps containing up to 99% sodium carbonate
• White hygroscopic powder

Regulatory Status

Regulatory & Food Contact	FDA Substance added to food: ANTIOXIDANT, CURING OR PICKLING AGENT, FLAVORING AGENT OR ADJUVANT, PH CONTROL A ACIDITY_REGULATOR: Food Additives ANTIOXIDANT, CURING OR PICKLING AGENT, FLAVORING AGENT OR ADJUVANT, PH CONTROL AGENT, PROCESSING AID NOT LIMITED NMRS 40/TRS 339-JECFA 9/16 FAS 67.29/NMRS 40A,B,C-JECFA 9/154
GHS notification summary	0.2% (19 / 8784)

GHS Hazard Classification

GHS notification summary	0.2% (19 / 8784)
Reported hazard statements	H319, H304, H318, H332, H370, H335, H336

Documented Uses

• CIR ingredient: Sodium Carbonate
• Used to make glass and inorganic sodium compounds, in detergents and cleansers, pulp and paper production, water treatment, aluminum production, textile processing (cleaning, bleaching, and dye assist formulation), petroleum refining, coal liquefaction, photography, mining (uranium and lithium recovery), flue gas desulfurization, decontaminating radioactive surfaces, sealing ponds from leakage, effluent and acid waste neutralization, consumer products (i.e. cosmetics, scouring powders, and clothes, dish, and floor
• Aluminum Producing [Category: Industry]
• Petroleum Production and Refining [Category: Industry]
• Pulp and Paper Processing [Category: Industry]
• Textiles (Fiber & Fabric Manufacturing) [Category: Industry]

Synonyms

SODIUM CARBONATE; 497-19-8; Soda Ash; Disodium carbonate; Carbonic acid disodium salt; Sodium carbonate, anhydrous; Calcined soda; Solvay soda; Sodium carbonate anhydrous; Washing soda; Bisodium carbonate; Carbonic acid, disodium salt; Carbonic acid sodium salt; Carbonic acid sodium salt (1:2); Soda, calcined; Soda-ash

Frequently Asked Questions

What are the CAS number and molecular formula of Soda Ash?

CAS 497-19-8; molecular formula Na2CO3; molecular weight — g/mol.

What other names is Soda Ash known by?

SODIUM CARBONATE, 497-19-8, Soda Ash, Disodium carbonate, Carbonic acid disodium salt, Sodium carbonate, anhydrous.

What is the regulatory status of Soda Ash?

Documented regulatory listings: FDA Substance added to food: ANTIOXIDANT, CURING OR PICKLING AGENT, FLAVORING AGENT OR ADJUVANT, PH CONTROL A; ACIDITY_REGULATOR: Food Additives; ANTIOXIDANT, CURING OR PICKLING AGENT, FLAVORING AGENT OR ADJUVANT, PH CONTROL AGENT, PROCESSING AID.

Is Soda Ash classified as hazardous?

0.2% of GHS notifications report no hazard classification (19 of 8784).

What are the key physical properties of Soda Ash?

Melting Point: 856 °C; Melting Point: 851 °C; Density: 2.54 g/cu cm; Density: Bulk density: 0.59-1.04 g/mL.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.