O-Toluidine

o-Toluidine
Names
Preferred IUPAC name
2-Methylaniline[1]
Other names
o-Methylaniline
o-Toluidine
1-Amino-2-methylbenzene
2-Aminotoluene, 2-Toluamine
Identifiers
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.002.209 Edit this at Wikidata
KEGG
UNII
Properties
C7H9N
Molar mass 107.156 g·mol−1
Appearance Colorless liquid
Odor Aromatic, aniline-like odor
Density 1.004 g/cm3
Melting point −23.68 °C (−10.62 °F; 249.47 K)
Boiling point 200 to 202 °C (392 to 396 °F; 473 to 475 K)
0.19 g/100 ml at 20 °C
Vapor pressure 0.307531 mmHg (25 °C)
1.56987
Viscosity 4.4335 (20 °C)
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 Flammable, moderately toxic
GHS labelling:
GHS02: FlammableGHS06: ToxicGHS07: Exclamation markGHS08: Health hazardGHS09: Environmental hazard
Danger
H301, H302, H319, H331, H350, H400
P201, P202, P261, P264, P270, P271, P273, P280, P281, P301+P310, P304+P340, P305+P351+P338, P308+P313, P311, P321, P330, P337+P313, P391, P403+P233, P405, P501
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 2: Must be moderately heated or exposed to relatively high ambient temperature before ignition can occur. Flash point between 38 and 93 °C (100 and 200 °F). E.g. diesel fuelInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
3
2
0
Flash point 85 °C (185 °F; 358 K)
481.67 °C (899.01 °F; 754.82 K)
Lethal dose or concentration (LD, LC):
900 mg/kg (rat, oral)
323 mg/kg (rabbit, oral)
Related compounds
Related compounds
 Toluidine
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

o-Toluidine (ortho-toluidine) is an organic compound with the chemical formula CH3C6H4NH2. It is the most important of the three isomeric toluidines. It is a colorless liquid although commercial samples are often yellowish. It is a precursor to the herbicides metolachlor and acetochlor.[2]

  1. ^ Nomenclature of Organic Chemistry: IUPAC Recommendations and Preferred Names 2013 (Blue Book). Cambridge: The Royal Society of Chemistry. 2014. p. 669. doi:10.1039/9781849733069-FP001 (inactive 2024-06-22). ISBN 978-0-85404-182-4. The names 'toluidine', 'anisidine', and 'phenetidine' for which o-, m-, and p- have been used to distinguish isomers, and 'xylidine' for which numerical locants, such as 2,3-, have been used, are no longer recommended, nor are the corresponding prefixes 'toluidine', 'anisidino', 'phenetidine', and 'xylidino'.{{cite book}}: CS1 maint: DOI inactive as of June 2024 (link)
  2. ^ Bowers, Joseph S. "Toluidines". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a27_159. ISBN 978-3527306732.