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Gallic acid CAS 149-91-7

Gallic acid (GA) is a component of hydrolyzable tannins, also known as gallic acid, chemical name 3,4,5-trihydroxybenzoic acid. The content of gallic acid in Yunnan Pu'er tea is relatively high.
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  • 149-91-7

Gallic acid Basic information
Product Name: Gallic acid
CAS: 149-91-7
MF: C7H6O5
MW: 170.12
EINECS: 205-749-9
Mol File: 149-91-7.mol
Gallic acid Chemical Properties
Melting point 251 °C (dec.) (lit.)
Boiling point 259.73°C (rough estimate)
density 1.694
vapor pressure 0Pa at 25℃
refractive index 1.5690 (estimate)
storage temp. 2-8°C
solubility Methanol (Slightly), Water (Slightly, Heated)
pka 4.41(at 25℃)
form Powder
color Off-white
PH 3.75(1 mM solution);3.22(10 mM solution);2.71(100 mM solution)
biological source plant fruit
Water Solubility 12 g/L cold water
Merck 144,345
BRN 2050274
Stability: Stability Stable, but may discolour upon exposure to light. Hygroscopic. Incompatible with strong oxidizing agents, strong bases, acid chlorides, acid anhydrides.
InChIKey LNTHITQWFMADLM-UHFFFAOYSA-N
LogP 0.7
CAS DataBase Reference 149-91-7(CAS DataBase Reference)
NIST Chemistry Reference Benzoic acid, 3,4,5-trihydroxy-(149-91-7)

Items

Standards

Appearance

A white to beige powder

Purity, %

99.0 Min.

SOLUBILITY(TURBIDITY)

50MG/ML ETOH

Clear

Loss on drying, %

0.5, Max.

Residue on ingnition,%

0.1 ,Max.

Tannic acid test

No turbidity

Sulfate %

0.01% Max.

As, ppm

3.0, Max.

Pb, ppm

10, Max.

通用固体

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