Monosodium tartrate

Monosodium tartrate
Names
	IUPAC name Sodium hydrogen tartrate
	Systematic IUPAC name Sodium 3-carboxy-2,3-dihydroxypropionate
	Other names Sodium bitartrate; E335
Identifiers
CAS Number	526-94-3 ;
3D model (JSmol)	Interactive image ;
ChemSpider	10239 ;
ECHA InfoCard	100.007.638
EC Number	238-470-6;
PubChem CID	23690454 ;
UNII	75E63I9H07 ;
CompTox Dashboard (EPA)	DTXSID40948715 DTXSID70883423, DTXSID40948715 ;
	InChI InChI=1S/C4H6O6.Na/c5-1(3(7)8)2(6)4(9)10;/h1-2,5-6H,(H,7,8)(H,9,10);/q;+1/p-1 Key: NKAAEMMYHLFEFN-UHFFFAOYSA-M ; InChI=1/C4H6O6.Na/c5-1(3(7)8)2(6)4(9)10;/h1-2,5-6H,(H,7,8)(H,9,10);/q;+1/p-1 Key: NKAAEMMYHLFEFN-REWHXWOFAB;
	SMILES C(C(C(=O)[O-])O)(C(=O)O)O.[Na+];
Properties
Chemical formula	C4H5NaO6
Molar mass	172.07 g/mol
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Last updated June 08, 2025

Monosodium tartrate or sodium bitartrate is a sodium acid salt of tartaric acid. As a food additive it is used as an acidity regulator and is known by the E number E335. As an analytical reagent, it can be used in a test for ammonium cation which gives a white precipitate.^[1]^[2]^[3]

References

↑ Younes, Maged; Aquilina, Gabriele; Castle, Laurence; Engel, Karl-Heinz; Fowler, Paul; Frutos Fernandez, Maria Jose; Fürst, Peter; Gürtler, Rainer; Gundert-Remy, Ursula; Husøy, Trine; Mennes, Wim; Shah, Romina; Waalkens-Berendsen, Ine; Wölfle, Detlef (2020-03-11). "Re-evaluation of l(+)-tartaric acid (E334), sodium tartrates (E335), potassium tartrates (E336), potassium sodium tartrate (E337) and calcium tartrate (E354) as food additives". EFSA Journal. 18 (3): e06030. doi:10.2903/j.efsa.2020.6030. ISSN 1831-4732. PMC 7448015 . PMID 32874248.
↑ Rusyniak, Daniel E.; Durant, Pamela J.; Mowry, James B.; Johnson, Jo A.; Sanftleben, Jayne A.; Smith, Joanne M. (2012-08-28). "Life-threatening hyperkalemia from cream of tartar ingestion". Journal of Medical Toxicology. 9 (1): 79–81. doi:10.1007/s13181-012-0255-x. ISSN 1937-6995. PMC 3570668 . PMID 22926733.
↑ "Potassium Acid Tartrate Handling/Processing" (PDF). Technical Evaluation Report (PDF). 15 (16): 11. January 11, 2017 – via United States Department of Agriculture.

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[1] Younes, Maged; Aquilina, Gabriele; Castle, Laurence; Engel, Karl-Heinz; Fowler, Paul; Frutos Fernandez, Maria Jose; Fürst, Peter; Gürtler, Rainer; Gundert-Remy, Ursula; Husøy, Trine; Mennes, Wim; Shah, Romina; Waalkens-Berendsen, Ine; Wölfle, Detlef (2020-03-11). "Re-evaluation of l(+)-tartaric acid (E334), sodium tartrates (E335), potassium tartrates (E336), potassium sodium tartrate (E337) and calcium tartrate (E354) as food additives". EFSA Journal. 18 (3): e06030. doi:10.2903/j.efsa.2020.6030. ISSN 1831-4732. PMC 7448015 . PMID 32874248.

[2] Rusyniak, Daniel E.; Durant, Pamela J.; Mowry, James B.; Johnson, Jo A.; Sanftleben, Jayne A.; Smith, Joanne M. (2012-08-28). "Life-threatening hyperkalemia from cream of tartar ingestion". Journal of Medical Toxicology. 9 (1): 79–81. doi:10.1007/s13181-012-0255-x. ISSN 1937-6995. PMC 3570668 . PMID 22926733.

[3] "Potassium Acid Tartrate Handling/Processing" (PDF). Technical Evaluation Report (PDF). 15 (16): 11. January 11, 2017 – via United States Department of Agriculture.

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Monosodium tartrate

See also

References