NILE
CHEMICALS
NILE
CHEMICALS
TANNIC ACID
Synonyms: Gallotannin; Gallotannic acid; Digallic
Acid, Glycerite, Tannin
CAS No.: 1401-55-4
Molecular Weight: 1701
Chemical Formula: Tannic acid is a mixture of hydrolyzable galloyl
tannins.
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Health Rating: 2 - Moderate
Flammability Rating: 1 - Slight
Reactivity Rating: 0 - None
Contact Rating: 1 - Slight
Lab Protective Equip: GOGGLES; LAB COAT; PROPER GLOVES
Storage Color Code: Green (General Storage)
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Potential Health Effects
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Acute and chronic systemic effects in man from normal routes of exposure to
tannins/tannic acid have not been well documented.
Inhalation:Nuisance dust with astringent action. May cause coughing and
sneezing with possible breathing difficulty at high concentrations.
Ingestion:Not highly toxic but may cause some gastrointestinal discomfort
due to its irritant and astringent action.
Skin Contact:Mild irritant and astringent. May cause inflammation on
prolonged contact. Contact with open wounds or burns may promote absorption and
systemic effects.
Eye Contact:Mild irritant. Can cause reddening and tearing, possibly pain
and blurred vision.
Chronic Exposure:Pathological findings in experimental animals show
evidence of gastritis, liver damage (the usual cause of death) and kidney
damage.
Aggravation of Pre-existing Conditions: Persons with pre-existing skin
disorders or eye problems, or impaired kidney, liver or respiratory function may
be more susceptible to the effects of the substance.
Inhalation:Remove to fresh air. Get medical
attention for any breathing difficulty.
Ingestion:Induce vomiting immediately as directed by medical personnel.
Never give anything by mouth to an unconscious person.
Skin Contact:Wash skin with plenty of water for at least 15 minutes. If
irritation develops, get medical attention.
Eye Contact:Immediately flush eyes with plenty of water for at least 15
minutes, lifting lower and upper eyelids occasionally. Get medical attention
immediately.
Fire:Flash point: 198C (388F)
Autoignition temperature: 526C (979F)
Fire is possible at elevated temperatures or by contact with an ignition source.
Explosion:Fine dust dispersed in air in sufficient concentrations, and in
the presence of an ignition source is a potential dust explosion hazard.
Fire Extinguishing Media:Water or water spray.
Special Information:In the event of a fire, wear full protective clothing
and NIOSH-approved self-contained breathing apparatus with full facepiece
operated in the pressure demand or other positive pressure mode.
Remove all sources of ignition. Ventilate area of leak or
spill. Wear appropriate personal protective equipment as specified in Section 8.
Spills: Clean up spills in a manner that does not disperse dust into the air.
Use non-sparking tools and equipment. Reduce airborne dust and prevent
scattering by moistening with water. Pick up spill for recovery or disposal and
place in a closed container.
Keep in a tightly closed container, stored in a cool, dry, ventilated area. Protect against physical damage. Protect from light. Avoid dust formation and control ignition sources. Employ grounding, venting and explosion relief provisions in accord with accepted engineering practices in any process capable of generating dust and/or static electricity. Empty only into inert or non-flammable atmosphere. Emptying contents into a non-inert atmosphere where flammable vapors may be present could cause a flash fire or explosion due to electrostatic discharge. Containers of this material may be hazardous when empty since they retain product residues (dust, solids); observe all warnings and precautions listed for the product.
Airborne Exposure Limits:None established.
Ventilation System:A system of local and/or general exhaust is
recommended to keep employee exposures as low as possible. Local exhaust
ventilation is generally preferred because it can control the emissions of the
contaminant at its source, preventing dispersion of it into the general work
area. Please refer to the ACGIH document, Industrial Ventilation, A Manual of
Recommended Practices, most recent edition, for details.
Personal Respirators (NIOSH Approved):For conditions of use where
exposure to dust or mist is apparent and engineering controls are not feasible,
a particulate respirator (NIOSH type N95 or better filters) may be worn. If oil
particles (e.g. lubricants, cutting fluids, glycerine, etc.) are present, use a
NIOSH type R or P filter. For emergencies or instances where the exposure levels
are not known, use a full-face positive-pressure, air-supplied respirator.
WARNING: Air-purifying respirators do not protect workers in oxygen-deficient
atmospheres.
Skin Protection:Wear protective gloves and clean body-covering clothing.
Eye Protection:Use chemical safety goggles. Maintain eye wash fountain
and quick-drench facilities in work area.
Appearance: Yellowish-tan powder.
Odor: Slight characteristic odor.
Solubility: 1 g/0.35 ml water
Density: No information
found.
pH: No information found.
% Volatiles by volume @ 21C (70F): 0
Boiling Point: Not
applicable.
Melting Point: ca. 210C (ca.
410F)
Vapor Density (Air=1): No
information found.
Vapor Pressure (mm Hg): No
information found.
Evaporation Rate (BuAc=1):
No information found.
Stability:Stable under ordinary conditions of use
and storage. Darkens on exposure to air or light. Hydrolyzed by acids, alkalis
or enzymes to gallic acid and glucose or quinic acid.
Hazardous Decomposition Products:Carbon dioxide and carbon monoxide may
form when heated to decomposition.
Hazardous Polymerization:Will not occur.
Incompatibilities:Salts of heavy metals, strong oxidizing agents, lime
water, albumin, gelatin, alkaloids.
Conditions to Avoid:Air, light, dusting, and incompatibles.
Environmental Fate: BOD - 38%, 5-jours.
Environmental Toxicity:No information found.
Whatever cannot be saved for recovery or recycling should be managed in an appropriate and approved waste disposal facility. Processing, use or contamination of this product may change the waste management options. State and local disposal regulations may differ from federal disposal regulations. Dispose of container and unused contents in accordance with federal, state and local requirements.
Not regulated.
Disclaimer: Nile Chemicals. provides the
information contained herein in good faith but makes no representation as to its
comprehensiveness or accuracy. This document is intended only as a guide to the
appropriate precautionary handling of the material by a properly trained person
using this product. Individuals receiving the information must exercise their
independent judgment in determining its appropriateness for a particular
purpose. NILE CHEMICALS. MAKES NO REPRESENTATIONS OR WARRANTIES, EITHER EXPRESS
OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE WITH RESPECT TO THE INFORMATION SET FORTH
HEREIN OR THE PRODUCT TO WHICH THE INFORMATION REFERS. ACCORDINGLY, NILE
CHEMICALS. WILL NOT BE RESPONSIBLE FOR DAMAGES RESULTING FROM USE OF OR RELIANCE
UPON THIS INFORMATION.
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