Metatartaric acid

Metatartaric acid
	; Idealized chemical structure of metartaric acid
Names
	Other names E353
Identifiers
CAS Number	39469-81-3 (unspecified form); 56959-20-7 (polyether form);
ECHA InfoCard	100.116.846
E number	E353 (antioxidants, ...)
Properties
Chemical formula	(C4H4O5)n
Molar mass	Variable
Appearance	Off-white solid
Solubility in water	Freely soluble
Solubility in ethanol	Soluble
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Metatartaric acid is a food additive. Chemically, it is a polymeric lactone of variable composition and different molecular weights obtained through a dehydration reaction by heating tartaric acid.^[2]

^ ^a ^b ^c Cite error: The named reference EFSA was invoked but never defined (see the help page).
^ "Cold Stabilization". Australian Wine Research Institute.

Names
Idealized chemical structure of metartaric acid
Other names E353
Identifiers
CAS Number	39469-81-3 (unspecified form) 56959-20-7 (polyether form)
ECHA InfoCard	100.116.846
E number	E353 (antioxidants, ...)
Properties
Chemical formula	(C₄H₄O₅)_n
Molar mass	Variable
Appearance	Off-white solid^[1]
Solubility in water	Freely soluble^[1]
Solubility in ethanol	Soluble^[1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references