119-93-7
Product Name:
O-Tolidine
Formula:
C14H16N2
Synonyms:
3,3′-Dimethylbenzidine;4,4′-Bianisidine;Ellms-Hauser solution
Inquiry
CHEMICAL AND PHYSICAL PROPERTIES
| Physical Description | 3,3'-dimethylbenzidine appears as white to reddish crystals or crystalline powder or a light tan powder. (NTP, 1992) |
|---|---|
| Color/Form | Colorless; in technical grades also brownish flakes |
| Boiling Point | 392 °F at 760 mmHg (NTP, 1992) |
| Melting Point | 264 to 268 °F (NTP, 1992) |
| Flash Point | 137 °C |
| Solubility | less than 1 mg/mL at 66 °F (NTP, 1992) |
| Density | 1 (NTP, 1992) |
| Vapor Pressure | 0.000001 [mmHg] |
| LogP | log Kow = 2.34 |
| Autoignition Temperature | 526 °C |
| Decomposition | When heated to decomposition it emits toxic fumes of /nitrogen oxides/. |
| Heat of Combustion | Liquid: 964.3 kg.cal |
| Dissociation Constants | pKa1 = 4.5; pKa2 = 3.3 (conjugate acid) |
| Kovats Retention Index | 380.7 381.39 |
| Other Experimental Properties | Barely becomes discolored upon exposure to air. It is chemically resistant to water. |
| Chemical Classes | Nitrogen Compounds -> Benzidine and Derivatives |
SAFETY INFORMATION
| Signal word | Danger |
|---|---|
| Pictogram(s) |
 Exclamation Mark Irritant GHS07  Health Hazard GHS08  Environment GHS09 |
| GHS Hazard Statements |
H302:Acute toxicity,oral H350:Carcinogenicity H411:Hazardous to the aquatic environment, long-term hazard |
| Precautionary Statement Codes |
P202:Do not handle until all safety precautions have been read and understood. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P270:Do not eat, drink or smoke when using this product. P273:Avoid release to the environment. P301+P312:IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. P308+P313:IF exposed or concerned: Get medical advice/attention. |
COMPUTED DESCRIPTORS
| Molecular Weight | 212.29 g/mol |
|---|---|
| XLogP3 | 2.3 |
| Hydrogen Bond Donor Count | 2 |
| Hydrogen Bond Acceptor Count | 2 |
| Rotatable Bond Count | 1 |
| Exact Mass | 212.131348519 g/mol |
| Monoisotopic Mass | 212.131348519 g/mol |
| Topological Polar Surface Area | 52 Ų |
| Heavy Atom Count | 16 |
| Formal Charge | 0 |
| Complexity | 205 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 0 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| Covalently-Bonded Unit Count | 1 |
| Compound Is Canonicalized | Yes |
PRODUCT INTRODUCTION
description
3,3'-dimethylbenzidine appears as white to reddish crystals or crystalline powder or a light tan powder. (NTP, 1992)