Description

2,3-Diaminotoluene (CAS No. 2687-25-4) is a high-purity aromatic diamine with the molecular formula C₇H₁₀N₂. Also known as 3-methylbenzene-1,2-diamine, this compound is a versatile intermediate in organic synthesis, offering excellent reactivity for polymerization, cross-linking, and coordination chemistry applications. Its two adjacent amino groups and methyl substitution make it ideal for producing polybenzimidazoles, dyes, and corrosion inhibitors. Our product is rigorously tested for purity (≥98% by HPLC) and consistency, ensuring reliable performance in research and industrial processes. Available in crystalline form with controlled moisture content, it is packaged under inert conditions to prevent oxidation. Suitable for use in pharmaceuticals, advanced materials, and specialty chemical synthesis.

Properties

• CAS Number: 2687-25-4
• Complexity: 92.9
• IUPAC Name: 3-methylbenzene-1,2-diamine
• InChI: InChI=1S/C7H10N2/c1-5-3-2-4-6(8)7(5)9/h2-4H,8-9H2,1H3
• InChI Key: AXNUJYHFQHQZBE-UHFFFAOYSA-N
• Exact Mass: 122.084398327
• Molecular Formula: C7H10N2
• Molecular Weight: 122.17
• SMILES: CC1=C(C(=CC=C1)N)N
• Topological: 52
• Monoisotopic Mass: 122.084398327
• Physical Description: Other Solid
• Color/Form: Crystals
• Boiling Point: 255 °C
• Melting Point: 63.5 °C
• Solubility: Very soluble in acetone, benzene, ethanol
• Vapor Pressure: 0.000553 [mmHg]
• Synonyms: 2,3-DIAMINOTOLUENE, 3-methylbenzene-1,2-diamine, 2687-25-4, Toluene-2,3-diamine, 1,2-Benzenediamine, 3-methyl-, 3-Methyl-o-phenylenediamine, 3-Methyl-1,2-benzenediamine, 3-Methyl-1,2-phenylenediamine, 2,3-Tolylenediamine, 2,3-Toluylenediamine, 1,2-Diamino-3-methylbenzene, Toluene, 2,3-diamino-, CCRIS 7692, 1-Methyl-2,3-phenylenediamine, HSDB 6077, SR8WC7LLQ2, EINECS 220-248-5, 3-methyl-1,2-diaminobenzene, BRN 0907184, DTXSID4027494, DTXCID807494, 3-13-00-00277 (Beilstein Handbook Reference), Toluene2,3diamine, 2,3Tolylenediamine, 2,3Toluylenediamine, Toluene, 2,3diamino, 3Methylophenylenediamine, 1,2Diamino3methylbenzene, 3Methyl1,2benzenediamine, 1Methyl2,3phenylenediamine, 3Methyl1,2phenylenediamine, 1,2Benzenediamine, 3methyl, 2,3TDA, 1,2-BENZENEDIAMINE, 3-METHYL-(9CI), 2,3-Diaminotoluene-d3, 2-Amino-3-methylphenylamine, MFCD00011589, CHEMBL3183504, 1246820-38-1, 105898-71-3, 2,3-TOLUENEDIAMINE, CAS-2687-25-4, 3-Methyl-benzene-1,2-diamine, UNII-SR8WC7LLQ2, toluene diamine, 4mre, 2,3 Diaminotoluene, 2,3 diamino toluene, 2,3-diamino toluene, 2,3-diamino-toluene, Tolylene-2,3-diamine, 3-methyl-l,2-benzenediamine, SCHEMBL42498, SCHEMBL98517, 2,3-Diaminotoluene, 97%, BIDD:GT0074, 3-methyl-ortho-phenylenediamine, SCHEMBL5325913, SCHEMBL5698538, SCHEMBL5698539, 3-Methyl-1,2-benzenediamine #, WZB82038, Tox21_200457, Tox21_300092, BDBM50008913, SBB051691, AKOS000121501, AC-9820, CS-W016576, PS-5505, NCGC00247901-01, NCGC00247901-02, NCGC00254106-01, NCGC00258011-01, SY001715, DB-047035, D3788, NS00001302, ST51038114, EN300-21159, 2,3-Toluenediamine; 3-Methylbenzene-1,2-diamine, Q27289352, Z104493206, InChI=1/C7H10N2/c1-5-3-2-4-6(8)7(5)9/h2-4H,8-9H2,1H, 3-Methyl-1,2-benzenediamine;Toluene-2,3-diamine;1,2-Diamino-3-methylbenzene, 2C9

Application

2,3-Diaminotoluene serves as a key precursor in the synthesis of heat-resistant polymers like polybenzimidazoles (PBIs), used in high-temperature fuel cells and aerospace materials. It is also employed in the production of azo dyes and pigments due to its ability to form stable diazo intermediates. Additionally, this compound finds use in corrosion inhibition formulations and as a chelating agent in metal coordination chemistry.

Safety and Hazards

GHS Hazard Statements

• H302: Harmful if swallowed [Warning Acute toxicity, oral]
• H317: May cause an allergic skin reaction [Warning Sensitization, Skin]
• H341: Suspected of causing genetic defects [Warning Germ cell mutagenicity]

Precautionary Statements

• P203, P261, P264, P270, P272, P280, P301+P317, P302+P352, P318, P321, P330, P333+P317, P362+P364, P405, and P501

Hazard Classes and Categories

• Acute Tox. 3 (45.5%)
• Acute Tox. 4 (54.5%)
• Acute Tox. 3 (20.8%)
• Acute Tox. 4 (79.2%)
• Skin Irrit. 2 (17%)
• Skin Sens. 1 (83%)
• Eye Irrit. 2 (60.6%)
• Acute Tox. 4 (23.5%)
• STOT SE 3 (16.7%)
• Muta. 2 (74.6%)
• Carc. 1B (83%)
• Repr. 2 (35.2%)
• Repr. 2 (39.4%)
• STOT RE 2 (74.6%)
• Aquatic Chronic 2 (83%)

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