Tannicacid , ACS , 1401-55-4

Synonym(s):
Gallotannin;Tannic acid;Tannin

CAS NO.：1401-55-4

Empirical Formula: C76H52O46

Molecular Weight: 1701.2

MDL number: MFCD06412477

EINECS: 215-753-2

PRODUCT Properties

• Melting point: 218 °C (lit.)
• Boiling point: 862.78°C (rough estimate)
• Density: 1.2965 (rough estimate)
• refractive index: 1.7040 (estimate)
• FEMA: 3042 | TANNIC ACID (QUERCUS SPP.)
• Flash point: 198°C
• storage temp.: Storage temperature: no restrictions.
• solubility: ethanol: soluble100mg/mL, yellow to brown
• form: Powder/Solid
• color: Yellow to light brown
• PH: 3.5 (100g/l, H2O, 20°C)
• Odor: Slight in solution, typical tannic acid
• Water Solubility: 250 g/L (20 ºC)
• Sensitive: Air & Light Sensitive
• Merck: 14,9052
• BRN: 8186396
• Stability: Stable. Incompatible with metallic salts, strong oxidizing agents, iron and other heavy metals.
• InChIKey: LRBQNJMCXXYXIU-PPKXGCFTSA-N
• LogP: 13.327 (est)

Description and Uses

Tannic acid is a naturally occurring plant polyphenol and can be found in practically all aerial plant tissues. Tannic acid was historically used for the treatment of diarrhea, topically to dress skin burns and rectally for treatment of unspecified rectal disorders. Pharmaceutical use of tannic acid is discontinued due to safer and better alternatives.
An unusually high incidence of esophageal cancer has been noted in areas of South Africa, where a sorghum rich in tannins is consumed. A positive relation has been observed between the tannin content of the sorghum and the incidence of esophageal cancer.

Tannic Acid is a sequestrant that refers to a mixture of hydrolyzable tannins of a more complex structure than gallic acid. it is used in clarifying beer and wine. see tannins.

Safety

• Symbol(GHS): GHS07
• Signal word: Warning
• Hazard statements: H303
• Precautionary statements: P270-P301+P312-P403-P501c
• Hazard Codes: Xi,Xn
• Risk Statements: 40-62-63-68-36/37/38-52/53
• Safety Statements: 24/25-36-26-36/37/39-22-61
• WGK Germany: 2
• RTECS: WW5075000
• Autoignition Temperature: 980 °F
• TSCA: Yes
• HS Code: 32019090
• Toxicity: LD50 oral in rabbit: 5gm/kg