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L-ascorbic acid

CAS No.:50-81-7
Molecular Weight: 176.12400 Molecular Formula: C6H8O6


Ascorbic acid is a naturally occurring organic compound with antioxidant properties. It is a white solid, but impure samples can appear yellowish. It dissolves well in water to give mildly acidic solutions. Ascorbic acid is one form ("vitamer") of vitamin C. It was originally called L-hexuronic acid, but, when it was found to have vitamin C activity in animals ("vitamin C" being defined as a vitamin activity, not then a specific substance), the suggestion was made to rename it. The new name, ascorbic acid, is derived from a- (meaning "no") and scorbutus (scurvy), the disease caused by a deficiency of vitamin C. Because it is derived from glucose, many non-human animals are able to produce it, but humans require it as part of their nutrition. Other vertebrates which lack the ability to produce ascorbic acid include some primates, guinea pigs, teleost fishes, bats, and some birds, all of which require it as a dietary micronutrient (that is, in vitamin form).

Basic Info

Chemical Name

L-ascorbic acid


CAS No.:


Molecular Formula:


Molecular Weight:







Appearance:White to very pale yellow crystalline powder with a pleasant sharp acidic taste
Melting Point:190-192ºC
Boiling Point:415.8ºC at 760 mmHg
Storage temp:0-6ºC
Refractive Index:1.711
Flash Point:180.4ºC
Solubility:333 g/L (20 ºC)
Stability:Stable. May be weakly light or air sensitive. Incompatible with oxidizing agents, alkalies, iron, copper.

Safety and Handling

Safety Statements:S24/25

HS Code:29362700

WGK Germany:1

Risk Statements:R20/21/22

Hazard Codes:Xn

Signal Word:Warning

Symbol:GHS02, GHS07

Caution Statement:P210; P305 + P351 + P338; P370 + P378

Hazard Declaration:H226; H319

NMR Spectrum