Acids & Salts Available — Bulk Only

Sodium Sesquicarbonate (Trona)

CAS 533-96-0 · Formula C2HNa3O6 · MW 189.99 g/mol

Carbonate-bicarbonate double salt for moderate-alkalinity cleaning, water softening, and bath products. HSDB documents its use as a detergent and soap builder, a mild alkaline agent for general cleaning and water softening, in bath salts, and in leather tanning.

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HS Code
2836.99
At a Glance
Material Family
Acids & Salts
Record Type
Pure compound
Primary Role
Cleaning / Degreasing · Thickening / Rheology
Functional Roles
SODIUM SESQUICARBONATE
BUFFERINGBULKINGCLEANSING
Industries Served
Applications & Use Cases
  • Cleaning: Alkaline builder for detergents and general cleaning.
  • Water softening: Sequesters hardness in wash water.
  • Bath products: Buffering agent in bath salts.
  • Leather: Alkaline agent in tanning.
  • Soda ash feedstock: Raw material for sodium carbonate production.
Physical Properties
Melting Point
Decomposes
Density
2.112
Solubility
Freely soluble in water
Safety & Handling
Full SDS available on request

A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.

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HS / Tariff Classification
Harmonized System (HS) Code — 6-digit international heading
2836 . 99
Chapter 28
Inorganic chemicals; compounds of precious metals and rare-earth metals
Heading 28.36
Internationally harmonized (WCO HS)
Subheading 2836.99
6-digit international code — national tariff line adds further digits
Chemical Identity
CAS Number
533-96-0
Molecular Formula
C2HNa3O6
Molecular Weight
189.99 g/mol
IUPAC Name
trisodium;hydrogen carbonate;carbonate
INCI Name
SODIUM SESQUICARBONATE
PubChem CID
InChI Key
WCTAGTRAWPDFQO-UHFFFAOYSA-K
Synonyms & Trade Names
SODIUM SESQUICARBONATE Magadi soda Snowflake crystals Urao Trisodium hydrogendicarbonate Sodium carbonate (3:2) Carbonic acid, sodium salt (2:3) SQ 810 SESQUI TM SOLVAY T 200 SOLVAY T-200 INS NO.500(III) INS-500(III) E-500(III) SODIUM MONOHYDROGENDICARBONATE SQ-810
Full Description

Sodium sesquicarbonate (CAS 533-96-0) is a double salt of sodium carbonate and sodium bicarbonate, occurring naturally as the mineral trona. HSDB documents its use as a detergent and soap builder, a mild alkaline agent for general cleaning and water softening, in bath salts, and in leather tanning. It is also used to produce sodium carbonate.

Frequently Asked Questions

What is another name for sodium sesquicarbonate?

It is a double salt of sodium carbonate and sodium bicarbonate (CAS 533-96-0), and it occurs naturally as the mineral trona. Trona is the common mineral name for the naturally occurring form. Confirm the CAS and grade on the CoA.

Is sodium sesquicarbonate the same as borax?

No. Sodium sesquicarbonate is a sodium carbonate/bicarbonate double salt, while borax is a sodium borate. They are chemically distinct and not interchangeable. Verify CAS 533-96-0 to avoid confusing the two.

What is sodium sesquicarbonate used for?

HSDB documents its use as a detergent and soap builder, a mild alkaline agent for general cleaning and water softening, a buffering agent in bath salts, and an alkaline agent in leather tanning. It is also used as a feedstock to produce sodium carbonate. RawSource supplies it in bulk for these industrial uses.

Is sodium sesquicarbonate water soluble?

Yes, it is water-soluble and dissolves to give a mildly alkaline solution, which is the basis for its cleaning and water-softening function. Confirm the supplied form and grade against your CoA. RawSource supplies it for industrial cleaning and processing.

What is the cost of bulk sodium sesquicarbonate?

Bulk pricing depends on grade, order volume, and packaging. Request a current quote from RawSource with your target quantity and we will return delivered pricing along with a CoA and SDS. We do not quote fixed list prices online.

Disclaimer. Information on this page — including properties, identifiers, hazard, transport (DOT/UN) and tariff (HS) classifications, and applications — is provided for general reference and is compiled from authoritative public sources (e.g. PubChem/ECHA, 49 CFR 172.101, the Harmonized Tariff Schedule). Values are typical and are not a guaranteed specification; the Certificate of Analysis (CoA) for the lot purchased governs. Products are sold for industrial and professional use only. Nothing here is a medical, health, or efficacy claim or advice. Always consult the current Safety Data Sheet (SDS) before handling, storage, transport or disposal, and confirm regulatory status, classification and suitability for your application and jurisdiction. Hazard, transport and tariff classifications must be verified for your specific shipment. RawSource makes no warranty, express or implied, and assumes no liability for use of this information. Trademarks. Third-party trademarks and brand names are the property of their respective owners; any reference is nominative — used only to identify a comparable product — and does not imply affiliation with, sponsorship by, or endorsement by the trademark owner.