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149-91-7

Name Gallic acid
CAS 149-91-7
EINECS(EC#) 205-749-9
Molecular Formula C7H6O5
MDL Number MFCD00002510
Molecular Weight 170.12
MOL File 149-91-7.mol

Chemical Properties

Appearance white powder
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)
form  Powder
pka 4.41(at 25℃)
color  Off-white
PH 3.75(1 mM solution);3.22(10 mM solution);2.71(100 mM solution)
Stability: Stability Stable, but may discolour upon exposure to light. Hygroscopic. Incompatible with strong oxidizing agents, strong bases, acid chlorides, acid anhydrides.
Water Solubility  12 g/L cold water
Detection Methods HPLC,NMR
Merck  14,4345
BRN  2050274
InChIKey LNTHITQWFMADLM-UHFFFAOYSA-N
LogP 0.7
Uses
gallic acid is a potential bleaching agent and anti-oxidant, it is also astringent and potentially anti-microbial and anti-fungal. Scientists are finding that gallic acid may serve as a skin-lightening agent by inhibiting the action of the tyrosinase and peroxidase enzymes. Some studies indicate that it is more effective than hydroquinone when combined with the proper ingredients. It is also incorporated into anti-aging formulations for its ability to prevent mucopolysaccaride deterioration. It is a constituent of witch hazel and oak bark, among many other plants; however, it is generally obtained from nutgalls for commercial purposes.
CAS DataBase Reference 149-91-7(CAS DataBase Reference)
NIST Chemistry Reference Benzoic acid, 3,4,5-trihydroxy-(149-91-7)
Storage Precautions Light sensitive
EPA Substance Registry System 149-91-7(EPA Substance)

Safety Data

Hazard Codes  Xi
Risk Statements 
R36/37/38:Irritating to eyes, respiratory system and skin .
Safety Statements 
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36:Wear suitable protective clothing .
S24/25:Avoid contact with skin and eyes .
WGK Germany  2
RTECS  LW7525000
8-9-23
TSCA  Yes
HS Code  29182900
Hazardous Substances Data 149-91-7(Hazardous Substances Data)
Toxicity
LD50 in rabbits (g/kg): 5.0 orally (Dollahite)

Hazard Information

Material Safety Data Sheet(MSDS)

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