EMS CATALOG NO:  13060
EMS PRODUCT: DAB
DATE:   05/12/95
PAGE NUMBER:  One of 4


MATERIAL SAFETY DATA SHEET

The information contained herein is based on data considered
accurate. However, no warranty is expressed or implied
regarding the accuracy of these data or the results to be
obtained from the use thereof.

Electron Microscopy Sciences assumes no responsibility for
personal injury or property damage to vendees, users or
third parties caused by the material. Such vendees or users
assume all risks associated with the use of the material.


ELECTRON MICROSCOPY SCIENCES
321 MORRIS ROAD
P.O. BOX 251
FORT WASHINGTON, PA 19034 24 HOUR EMERGENCY PHONE NUMBER
(215) 646-1566 CHEMTREC: (800) 424-9300
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FOR PRODUCT AND SALES INFORMATION
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CONTACT ELECTRON MICROSCOPY SCIENCES OFFICE ABOVE.

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PRODUCT IDENTIFICATION
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PRODUCT NAME: 3,3'-Diamino-benzidine, DAB

CAS NUMBER: 91-95-2

FORMULA: C12H14N4

SYNONYMS: 3,3'-Diaminobenzidene * 3,3',4,4'-Diphenyltetramine * 
3,3',4,4'-Tetraaminobiphenyl *
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HAZARDS IDENTIFICATION 
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LABEL PRECAUTIONARY STATEMENTS:

Toxic
May cause cancer.
Harmful by inhalation, in contact with skin and if swallowed.
Possible risk of irreversible effects.
Possible mutagen.
In case of accident or if you feel unwell, seek medical advice
immediately (show the label where possible).
Wear suitable protective clothing, gloves and eye/face protection.
Do not breathe dust.
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FIRST-AID MEASURES
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In case of contact, immediately flush eyes or skin with copious
amounts of water for at least 15 minutes while removing contaminated
clothing and shoes.

If inhaled, remove to fresh air. If not breathing give artificial
respiration. If breathing is difficult, give oxygen.

If swallowed, wash out mouth with water provided person is conscious.
Call a physician.

Discard contaminated clothing and shoes.
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FIRE FIGHTING MEASURES 
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EXTINGUISHING MEDIA:

Water spray. Carbon Dioxide, dry chemical powder or appropriate
foam. 

SPECIAL FIREFIGHTING PROCEDURES:

Wear self-contained breathing apparatus and protective clothing
to prevent contact with skin and eyes.

UNUSUAL FIRE AND EXPLOSIONS HAZARDS:

Emits toxic fumes under fire conditions.

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ACCIDENTAL RELEASE MEASURES
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Evacuate area.
Wear self-contained breathing apparatus, rubber boots and heavy
rubber gloves.
Wear disposable coveralls and discard them after use.
Sweep up, place in a bag and hold for waste disposal. 
Ventilate area and wash spill site after material pickup is complete.

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EXPOSURE CONTROLS/PERSONAL PROTECTION
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Wear appropriate NIOSH/MSHA-approved respirator, chemical resistant
gloves, safety goggles, other protective clothing. Safety shower
and eye bath.
Use only in a chemical fume hood.
Do no breathe dust.
Avoid prolonged or repeated exposure.
Wash thoroughly after handling.
Carcinogen.
Possible Mutagen.
Harmful solid.
Keep tightly closed.
Store in a cool dry place.

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PHYSICAL AND CHEMICAL PROPERTIES  _____________________________________________________________________

APPEARANCE AND ODOR: Brown Powder

MELTING POINT: 175oC to 177oC

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STABILITY AND REACTIVITY
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INCOMPATIBILITIES: Strong oxidizing agents.

HAZARDOUS COMBUSTION OR DECOMPOSITION PRODUCTS TOXIC FUMES OF:

Carbon Monoxide, Carbon Dioxide.
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TOXICOLOGICAL INFORMATION 
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ACUTE EFFECTS: 

Harmful if swallowed, inhaled, or absorbed through skin.
May cause irritation.

CHRONIC EFFECTS:

Carcinogen.
Laboratory experiments have shown mutagenic effects.
To the best of our knowledge, the chemical, physical, and Toxicological
properties have not been thoroughly investigated.

RTECS NO: DV8750000 - 3,3'4,4'-Biphenyltetramine

TOXICITY DATA:

Orl-Mus LD50: 1834 mg/kg GISAAA 46(1),94,81
Only selected registry of toxic effects of chemical substances
(RTECS) data is presented here. See actual entry in RTECS for
complete information.

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DISPOSAL CONSIDERATIONS
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Dissolve or mix the material with a combustible solvent and burn
in a chemical incinerator equipped with an afterburner and scrubber.
Observe al Federal, State and Local environmental regulations.

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REGULATORY INFORMATION
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REVIEWS, STANDARDS, AND REGULATIONS:

NOES 1983: HZD X5448; NIS 1; TNF 38; NOS 2; TNE 135; TFE 95
EPA TSCA Chemical Inventory, June 1993
EPA TSCA TEST SUBMISSION (TSCATS) Data Base, July 1994
California Proposition 65:
This product is or contains chemical(s) known to the state of
California to cause cancer.