Tannic acid

  • Gallotannin
  • Glycerite
  • Gallotannic acid
  • Vitanil B
  • Fresh Shiraimatsu FS 500M
  • Catechins
Formula
C76H52O46
Description
Light yellow to tan solid with a faint odor. Gallic acid derivatives found in nutgalls, bark and other plant parts, especially oak bark.
Uses
Mordant in dyeing, manufacture ink, sizing paper & silk, printing fabrics, tanning, as coagulant in rubber mfr, with gelatin & albumin for manufacture of imitation horn & tortoise shell, clarifying beer or wine, in photography, manufacture gallic acid & pyrogallol, as reagent in analytical chemistry.

Registry Numbers and Inventories.
CAS
1401-55-4
EC (EINECS/ELINCS)
215-753-2
S 22 36/37
RTECS
WW5075000
RTECS class
Tumorigen; Mutagen; Reproductive Effector; Natural Product
Merck
12,9221
Beilstein/Gmelin
8191228
EPA OPP
78502
Swiss Giftliste 1
G-2899
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Korea ECL
Listed

Properties.
Formula
C76H52O46
Formula mass
1701.22
Melting point, °C
218-219
Density
>1 g/cm3 (20 C) (solid)
Solubility in water
Soluble
Heat of combustion
-38385 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry, well-ventilated area away from incompatible substances. Keep containers tightly closed. Store protected from light.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Minimize dust generation and accumulation. Do not get in eyes, on skin, or on clothing. Keep container tightly closed. Do not ingest or inhale.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Clean up spills immediately, using the appropriate protective equipment. Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Avoid generating dusty conditions. Provide ventilation.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents; strong bases.
Decomposition
Carbon monoxide, carbon dioxide, acrid smoke and fumes.

Fire.
Autoignition, °C
527
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Runoff from fire control or dilution water may cause pollution. Extinguishing media: Use water spray to cool fire-exposed containers. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
Fire potential
Slightly. Requires preheating. Slight hazard.
Combustion products
Decomposes at 210 to carbon dioxide and pyrogallol, which can form irritating vapors.
Health
1
 
Flammability
1
 
 
Reactivity
0
 

Health.
Poison_Class
4
Exposure effects
Chronic ingestion may cause liver damage.
   Ingestion
May cause gastrointestinal irritation with nausea, vomiting and diarrhea. May cause liver damage.
   Inhalation
Dust is irritating to the respiratory tract.
   Skin
May cause skin irritation. May be absorbed through the skin in harmful amounts.
   Eyes
May cause eye irritation. May result in corneal injury.

First aid
 
   Ingestion
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid if irritation or symptoms occur.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid if cough or other symptoms appear.
   Skin
Get medical aid if irritation develops or persists. Flush skin with plenty of soap and water.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
USCG CHRIS Code
TNA
 
HS Code
3201 90 90