Acids & Salts Available — Bulk Only

Sodium Citrate (Trisodium Citrate)

CAS 68-04-2 · Formula C6H5Na3O7 · MW 258.07 g/mol

A citrate buffer and metal sequestrant that holds pH steady across food, detergent, and plating baths. It controls pH and binds metal ions in food, cleaning, and industrial formulations.

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HS Code
2918.15
At a Glance
Material Family
Acids & Salts
Record Type
Pure compound
Primary Role
Chelation / Sequestration · pH Adjustment
Functional Roles
SODIUM CITRATE
BUFFERINGCHELATINGFRAGRANCE
Applications & Use Cases
  • Buffering agent: pH control and acidity regulation in formulations.
  • Sequestrant: Binds metal ions in food and industrial products.
  • Emulsifier: Emulsifying salt in food applications.
  • Detergents: Builder and sequestrant in detergent formulations.
  • Electroplating: Complexing agent in electroplating baths.
Physical Properties
Physical Description
Dry Powder; Liquid; Dry Powder, Liquid, Other Solid; Other Solid; Liquid, Other Solid
Boiling Point
BP: Decomposes at red heat /Dihydrate/
Melting Point
>300 °C
Solubility
White, odorless crystals, granules or powder; cool, saline taste. Stable in air; becomes anhydrous at 150 °C. Sol in 1.3 parts water, 0.6 part boiling water. Insol in alcohol. The aqueous soln is slightly alkaline to litmus; pH about 8; /Dihydrate/
pH
Between 7,5 and 9,0 (5 % aqueous solution)
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
2918 . 15
Chapter 29
Organic chemicals
Heading 29.18
Internationally harmonized (WCO HS)
Subheading 2918.15
6-digit international code — national tariff line adds further digits
Chemical Identity
CAS Number
68-04-2
Molecular Formula
C6H5Na3O7
Molecular Weight
258.07 g/mol
IUPAC Name
trisodium;2-hydroxypropane-1,2,3-tricarboxylate
INCI Name
SODIUM CITRATE
PubChem CID
InChI Key
HRXKRNGNAMMEHJ-UHFFFAOYSA-K
Synonyms & Trade Names
Sodium citrate TRISODIUM CITRATE Citrosodine Natrocitral Citric acid, trisodium salt Trisodium citrate, anhydrous sodium citrate, anhydrous Citnatin Citrosodina Citrosodna Citreme trisodium-citrate anhydrous sodium citrate Anhydrous trisodium citrate Trisodium citrate anhydrous Sodium citrate (Na3C6H5O7) Sodium citrate,anhydrous Natrii citras Bicitra INS NO.331(III)
Full Description

Sodium citrate (trisodium citrate, CAS 68-04-2) is the sodium salt of citric acid, used as a buffering agent, sequestrant, and emulsifier. It controls pH and binds metal ions in food, cleaning, and industrial formulations. It is also used in detergents and in electroplating.

Frequently Asked Questions

What is sodium citrate used for?

Sodium citrate (trisodium citrate, CAS 68-04-2) is the sodium salt of citric acid, used industrially as a buffering agent for pH control, as a sequestrant that binds metal ions, and as an emulsifying salt. It also serves as a builder and sequestrant in detergent formulations and as a complexing agent in electroplating baths.

Is sodium citrate just salt?

No. Sodium citrate is the trisodium salt of citric acid (C6H5Na3O7), chemically distinct from sodium chloride (table salt). It functions as a buffer and metal-ion sequestrant rather than a flavoring salt.

What is the formula for sodium citrate?

Trisodium citrate has the molecular formula C6H5Na3O7 (CAS 68-04-2). It is the fully neutralized sodium salt of citric acid.

What HS code is sodium citrate classified under?

Sodium citrate is typically classified under HS code 2918.15 (salts and esters of citric acid). Confirm the destination-country tariff line and request a CoA and SDS with your order.

What is the cost of bulk sodium citrate?

Bulk pricing depends on grade, packaging (bags, drums, totes), and volume. Request a bulk quote with your target quantity and grade requirements; we supply to manufacturers and blenders.

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.