L-ASCORBIC ACID AR

L-ASCORBIC ACID AR

L-ASCORBIC ACID AR

Article No.	Grade	Purity	Cas no.	Molecular Formula	Molecular Weight	H.S. Code	Shelf Life
A0029600500	AR	99.5%	50-81-7	C₈H₈O₆	176.12	2936.2700	60 Months

Physical Properties

Physical state at 20 °C

Solid

Colour

White crystalline

Odour

Odorless

pH value

1 - 2.5

Melting Point/ Freezing point [°C]

190 - 194 °C

Density [g/cm3]

1.65

Solubility in water [% weight]

176 g/l at 20 °C - completely soluble

Specifications

Appearance:	A white to very pale yellow crystalline powder or colourless crystals; odourless. On exposure to light it gradually darkens.
Identity (IR):	To confirm the structure
Sulphated ash:	Max 0.1%
Loss on drying:	Max 0.1%
Chloride (Cl):	Max 0.01%
Sulphate (SO4):	Max 0.002%
Heavy metal (as Pb):	Max 0.001%
Lead (Pb):	Max 0.001%
Iron (Fe):	Max 0.0002%
Copper (Cu):	Max 0.0005%
Assay:	99.5-100.5%
Appearance of solution:	To comply IP test
Oxalic acid:	Max 0.3%
Identification (as per USP, IP):	To comply the tests
Light absorption:	Absorbance at about 244 nm is about 0.56
Specific optical rotation ([α]20/D; 10% solution):	+20.5° to +21.5°