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Tannic acid CAS#1401-55-4

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Chemical Name：Tannic acid

CAS No.:1401-55-4

Molecular Formula:C76H52O46

Molecular weight:1701.2

Sample: Available

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Product Details

Products Description of Tannic acid CAS#1401-55-4

Tannic acid, also known as tannic acid, is an organic compound with a chemical formula of C76H52O46. It is a yellow or brownish yellow powder. Its aqueous solution turns blue-black when it meets an iron salt solution. Adding sodium sulfite can delay the discoloration.

In industry, tannic acid is widely used in tanning leather and making blue ink. Tannic acid can coagulate protein. People use tannic acid to chemically treat raw pig skin and raw cow skin, which can coagulate the soluble protein in the raw skin. As a result, the raw skin that would stink and rot after a few days becomes beautiful, clean, flexible and durable leather. This leather making process is called leather tanning.

Tannic acid Chemical 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.)
Fp	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)
IARC	3 (Vol. 10, Sup 7) 1987
EPA Substance Registry System	Tannic acid (1401-55-4)

Safety Information

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
Hazardous Substances Data	1401-55-4(Hazardous Substances Data)
Toxicity	LD50 oral in rabbit: 5gm/kg

Product Application of Tannic acid CAS#1401-55-4

Clarifier, astringent, crude oil deodorant, fragrance aid; tannic acid can be used for tanning, ink manufacturing, paper and silk gluing, boiler descaling, etc. It can also be used as a mordant, a clarifying agent for beer and wine, a coagulant for rubber, etc.

It can be used in printing and dyeing, metallurgy, medicine and other industries. Tannic acid itself has very low toxicity. Precipitation and weight determination of beryllium, aluminum, gallium, indium, niobium, tantalum and zirconium. Ratio determination of copper, iron, vanadium, cerium and cobalt. Precipitant for proteins and alkaloids. External indicator for ammonium molybdate titration of lead. Mordant for dyes.

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