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Description

Potassium Tartrate · CAS 921-53-9 · C4H4K2O6. UNII O9WLL1ZL8S.

Identification

CAS Registry Number	921-53-9
PubChem CID	8984
Molecular formula	C4H4K2O6
IUPAC name	dipotassium;(2R,3R)-2,3-dihydroxybutanedioate
UNII (FDA)	O9WLL1ZL8S

Computed Descriptors

Molecular Weight	226.27
Hydrogen Bond Donor Count	2
Hydrogen Bond Acceptor Count	6
Rotatable Bond Count	1
Exact Mass	225.92820081
Monoisotopic Mass	225.92820081
Topological Polar Surface Area	121
Heavy Atom Count	12
Formal Charge	0
Complexity	123

Physical description & handling notes

• White crystalline or granulated powder
• Between 7,0 and 9,0 (1 % aqueous solution)

Regulatory Status

Regulatory & Food Contact	SEQUESTRANT; STABILIZER: Food Additives JECFA ADI: 0-30 mg/kg bw Not re-evaluated by JECFA, but the provisions for potassium l(+)-tartrate was withdrawn at CCFA47 NMRS 53/TRS 539-JECFA 17/24 FAS 5/NMRS 53A-JECFA 17/512
GHS notification summary	97.2% (35 / 36)

GHS Hazard Classification

GHS notification summary	97.2% (35 / 36)

Documented Uses

• EPA Safer Chemical Functional Use Classes -> Processing Aids and Additives
• Safer Chemical Classes -> Green half-circle - The chemical is expected to be of low concern
• Food Additives -> SEQUESTRANT; STABILIZER -> JECFA Functional Classes
• Butanedioic acid, 2,3-dihydroxy- (2R,3R)-, potassium salt (1:2): ACTIVE
• Osmotic Activity [MoA]; Inhibition Large Intestine Fluid/Electrolyte Absorption [PE]; Potassium Salt [EPC]; Increased Large Intestinal Motility [PE]; Osmotic Laxative [EPC]; Potassium Compounds [CS]

Synonyms

POTASSIUM TARTRATE; 921-53-9; O9WLL1ZL8S; INS NO.336(II); INS-336(II); DTXSID90889442; E-336(II); KALI TARTARICUM; RefChem:57012; DTXCID801028695; Butanedioic acid, 2,3-dihydroxy-(2R,3R)-, dipotassium salt; Butanedioic acid, 2,3-dihydroxy-(2R,3R)-, potassium salt (1:2); 213-067-8; Dipotassium tartrate; Potassium L-tartrate; dipotassium;(2R,3R)-2,3-dihydroxybutanedioate

Frequently Asked Questions

What are the CAS number and molecular formula of Potassium Tartrate?

CAS 921-53-9; molecular formula C4H4K2O6; molecular weight — g/mol.

What other names is Potassium Tartrate known by?

POTASSIUM TARTRATE, 921-53-9, O9WLL1ZL8S, INS NO.336(II), INS-336(II), DTXSID90889442.

What is the regulatory status of Potassium Tartrate?

Documented regulatory listings: SEQUESTRANT; STABILIZER: Food Additives; JECFA ADI: 0-30 mg/kg bw; Not re-evaluated by JECFA, but the provisions for potassium l(+)-tartrate was withdrawn at CCFA47.

Is Potassium Tartrate classified as hazardous?

97.2% of GHS notifications report no hazard classification (35 of 36).

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.