ONPG

RT

301, 26

White to slight yellow powder

A colorimetric substrate for beta-D-glucuronidase used in the identification of E. coli and Salmonella.

Synonyms:
o-Nitrophenyl-beta-D-galactoside; 2-Nitrophenyl-beta-D-galactopyranoside

CAS No:
369-07-3

Molecular Formula:
C12H15NO8

Molecular Weight:
301.26

Purity (HPLC):
≥99%

Appearance:
White to off-white crystalline powder

Melting Point:
195°C (dec) (lit)

Solubility (1%, H2O):
Colorless to slight yellow, clear, complete
Soluble in 3% methanol

Water (KF):
≤0.5%

Optical Rotation (C=1, H2O):
[a]D20: -68.0 ± 3°

Residual Solvents:
O-Nitrophenol: ≤0.03%

Storage and Stability:
Store at 4ºC. Stable for 12 months after receipt.