o-Tolidine

  • 4,4'-Bi-o-toluidine
  • 3,3'-Dimethylbenzidine
  • Bianisidine
  • 3,3'-dimethyl-(1,1'-Biphenyl)-4,4'-diamine
Formula
C14H16N2
Structure
Description
White to reddish crystals or crystalline powder or a light tan powder.
Uses
Very sensitive reagent for detection of gold (1:10 million detectable), and free chlorine in water.

Registry Numbers and Inventories.
CAS
119-93-7
EC (EINECS/ELINCS)
204-358-0
EC Index Number
612-041-00-7
EC Class
Carcinogenic Category 2; Harmful; Dangerous for the Environment
RTECS
DD1225000
RTECS class
Tumorigen; Mutagen
UN (DOT)
2811
Merck
12,9651
Beilstein/Gmelin
2210640
Beilstein Reference
4-13-00-00419
RCRA
U095
Swiss Giftliste 1
G-2951
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C14H16N2
Formula mass
212.29
Boiling point, °C
361
Vapor pressure, mmHg
2E-5 (25 C)
Density
1.234 g/cm3
Solubility in water
1.3 g/L
Refractive index
1.641 (125 C)
pKa/pKb
9.31 (pKb)
Partition coefficient, pKow
2.34
Heat of vaporization
60.7 kJ/mol
Heat of combustion
-1670 kJ/mol

Hazards and Protection.
Storage
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Store protected from light and air.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation.
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
Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Avoid generating dusty conditions.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizers
Decomposition
Nitrogen oxides, carbon monoxide, carbon dioxide.

Fire.
Flash Point,°C
205
Autoignition, °C
526
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. To extinguish fire use water spray, dry chemical, carbon dioxide, or chemical foam.
Fire potential
This material is probably combustible.
Hazards
Contact with metals may evolve flammable hydrogen gas.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
1
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure limit(s)
TLV: ppm; mg/m3 A3 (skin) (ACGIH 1997). OSHA PEL: See Appendix C NIOSH REL: Ca C 0.02 mg/m3 60-minute skin See Appendix A See Appendix C NIOSH IDLH: Potential occupational carcinogen
Carcinogin
G-A3, I-2B, N-2, CP65
Poison_Class
1*
Exposure effects
May cause cancer in humans.
   Ingestion
May cause irritation of the digestive tract. The toxicological properties of this substance have not been fully investigated.
   Inhalation
May cause respiratory tract irritation. The toxicological properties of this substance have not been fully investigated.
   Skin
Causes skin irritation.
   Eyes
Causes eye irritation.

First aid
 
   Ingestion
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 immediately.
   Inhalation
Remove from exposure to fresh air immediately. Get medical aid if cough or other symptoms appear.
   Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Remove contaminated clothing and shoes.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
2811
Response guide
Hazard class
6.1
Packing Group
I; II; III
 
USCG CHRIS Code
DLZ