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Gallic acid 149-91-7  3,4,5-Trihydroxybenzoic acid

Gallic acid CAS 149-91-7

CAS 149-91-7

CAS 149-91-7

Name:    Gallic acid
Synonyms:    Gallic acid 149-91-7;TIMTEC-BB SBB008781;RARECHEM AL BE 0070;3,4,5-trihydroxy-benzoicaci;gallic;Gallussaure;Kyselina 3,4,5-trihydroxybenzoova;Kyselina gallova
CAS:    149-91-7
MF:    C7H6O5
MW:    170.12
EINECS:    205-749-9

3,4,5-Trihydroxybenzoic acid; Pyrogallol-5-carboxylic acid; Gallic Acid Anhydrous; Gallic acid(anhydrous)
CAS RN.:     
149-91-7
EINECS:     205-749-9

Gallic acid is a trihydroxybenzoic acid, a type of phenolic acid, a type of organic acid, also known as 3,4,5-trihydroxybenzoic acid, found in gallnuts, sumac, witch hazel, tea leaves, oak bark, and other plants. The chemical formula is C6H2(OH)3COOH. Gallic acid is found both free and as part of hydrolyzable tannins. The gallic acid groups are usually bonded to form dimers such as ellagic acid. Hydrolyzable tannins break down on hydrolysis to give gallic acid and glucose or ellagic acid and glucose, known as gallotannins and ellagitannins respectively.
Gallic acid forms intermolecular esters (depsides) such as digallic and trigallic acid, and cyclic ether-esters (depsidones).
Gallic acid is commonly used in the pharmaceutical industry. It is used as a standard for determining the phenol content of various analytes by the Folin-Ciocalteau assay; results are reported in gallic acid equivalents. Gallic acid can also be used as a starting material in the synthesis of the psychedelic alkaloid mescaline.
The name is derived from oak galls, which were historically used to prepare tannic acid. Despite the name, gallic acid does not contain gallium. Salts and esters of gallic acid are termed "gallates".
Appearance & Physical State     white crystalline powder
Density     1.694
Boiling Point     501.1ºC at 760 mmHg
Melting Point     251ºC (dec.)
Flash Point     271ºC
Refractive Index     1.73
Water Solubility     12 g/L cold water
Stability     Stability Stable, but may discolour upon exposure to light. Hygroscopic. Incompatible with strong oxidizing agents, strong bases, acid chlorides, acid anhydrides.
Storage Condition     Do not store in direct sunlight. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Store protected from light.
Vapor Pressure     7.32E-11mmHg at 25°C
Safety Info
RTECS     LW7525000
Safety Statements     S24/25
HS Code     2918290000

Product Categories:    chemical reagent;pharmaceutical intermediate;phytochemical;reference standards from Chinese medicinal herbs (TCM).;standardized herbal extract;Fine chemicals;-;Food additive,Antioxidant anticorrosive;Inhibitors;Pharmaceutical Intermediates;Aromatic Carboxylic Acids, Amides, Anilides, Anhydrides & Salts
Mol File:    149-91-7.mol
Gallic acid Structure
Gallic acid Chemical Properties
Melting point     252 °C (dec.)(lit.)
Boiling point     259.73°C (rough estimate)
density     1.694
refractive index     1.5690 (estimate)
storage temp.     Store below +30°C.
form     Powder
pka    4.41(at 25℃)
color     Off-white
Water Solubility     12 g/L cold water
Merck     14,4345
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
CAS DataBase Reference    149-91-7(CAS DataBase Reference)
NIST Chemistry Reference    Benzoic acid, 3,4,5-trihydroxy-(149-91-7)
EPA Substance Registry System    Benzoic acid, 3,4,5-trihydroxy-(149-91-7)
Safety Information
Hazard Codes     Xi
Risk Statements     36/37/38
Safety Statements     26-36-24/25-37/39
WGK Germany     2
RTECS     LW7525000
F     8-9-23
TSCA     Yes
HS Code     29182900

Gallic acid Usage And Synthesis

Chemical Properties    Colorless crystalline needles or prisms obtained from nutgall tannins,gallic acid is soluble in water and alcohol and melts at 235 to 240 °C. Also known as trihydroxybenzoic acid, it is used in photography, tanning, ink manufacture and pharmaceuticals.
Uses    Gallic acid is an important component of iron gall ink, the standard European writing and drawing ink from the 12 th to 19th century with a history extending to the Roman empire and the Dead Sea Scrolls.

Gallic acid Preparation Products And Raw materials
Preparation Products    3,4,5-TRIETHOXYBENZOIC ACID-->1,2,3-Trimethoxybenzene-->Methyl gallate-->Ethyl gallate-->2,3,4-Trimethoxybenzaldehyde-->2,3,4-Trihydroxybenzaldehyde
Raw materials    Glycerite-->Gallic acid monohydrate
Tag:Gallic acid(149-91-7)