Tannic acid
Tannic acid
- CAS:
- 1401-55-4
- MF:
- C76H52O46
- MW:
- 1701.2
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Properties
- Melting point:
- 218 °C (lit.)
- Boiling point:
- 862.78°C (rough estimate)
- Density
- 1.2965 (rough estimate)
- refractive index
- 1.7040 (estimate)
- 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
- biological source
- synthetic
- 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
- 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
- Hazardous Substances Data
- 1401-55-4(Hazardous Substances Data)
- Toxicity
- LD50 oral in rabbit: 5gm/kg
Use
Tannic acid is a powder extracted from gall nuts that is soluble in water but less so in alcohol. Tannic acid was used by Major Russell in the mid-1850s for the tannin process of preparing dry collodion plates. The collodion plate was coated and sensitized as usual but the excess silver was then washed completely from the surface. A solution of tannic acid was then poured on and off the plate and the collodion film allowed to dry completely in the dark. The tannin plate could be preserved for months prior to exposure. The exposed plate was developed in pyrogallic acid, citric acid, and silver nitrate to replace that which was washed off during the initial preparation. The exposures required for tannin plates were as much as five times longer than wet collodion plates, which made them suitable only for landscape work.
18 India supplier list of "Tannic acid"
- Product Name:Tannic acid
- Products Intro:Purity: 98% | Package: 1 kg,5 kg, 10 kg,25kg And 1MT
- Company Type: Reagent
- Country/Region: Maharashtra,INDIA
- Product Name:TANNIC ACID
- Products Intro:Purity: AR,ACS | Package: 100GM;500GM
- Company Type: Reagent
- Country/Region: Maharashtra,INDIA
- Product Name:TANNIC ACID
- Products Intro:Purity: 99% | Package: 1 kg,5 kg, 10 kg,25kg and 1 MT
- Company Type: Manufacturer
- Country/Region: Maharashtra,INDIA
- Product Name:Tannic acid
- Products Intro:Purity: 99% | Package: 1 kg,5 kg, 10 kg,25kg and 1 MT
- Company Type: Reagent
- Country/Region: Haryana,INDIA
- Product Name:Tannic acid
- Products Intro:Purity: 99% | Package: 1 kg,5 kg, 10 kg,25kg and 1 MT
- Company Type: Reagent
- Country/Region: Maharashtra,INDIA
- Product Name:Tannicacid
- Products Intro:Brand:sigma aldrich | Product Number:16201 | Purity:puriss.,meetsanalyticalspecificationofUSP,powder
- Company Type: Trader
- Country/Region: Bangalore,INDIA
- Product Name:Tannic acid 95%
- Products Intro:Brand：Glrinnovations | OriginalID：GLR19.156888
- Company Type: Trader
- Country/Region: New Delhi,INDIA
- Product Name:Tannic acid
- Company Type: Trader
- Country/Region: New Delhi,INDIA
- Product Name:Tannic acid
- Company Type: Trader
- Country/Region: Mumbai,INDIA
- Product Name:Tannic acid
- Company Type: Trader
- Country/Region: New Delhi,INDIA