o-Tolidine
- CAS Number
- 119-93-7
- HSN Code
- 29214330
- Molecular Formula
- C14H16N2
- Catalogue Number
- AL4588
- Purity
- ≥ 98%
- Molecular Weight
- 212.30 g/mol
Complies with : IP | BP | USP | EP | ACS
ISO 9001
ISO 14001
GMP
COA with every batch
Key Properties
3,3'-Dimethylbenzidine is a member of biphenyls.
Also known as 2,4-Diaminotoluene.
- Catalogue No.
- AL4588
- CAS Number
- 119-93-7
- Molecular Formula
- C14H16N2
- Molecular Weight
- 212.30 g/mol
- HSN Code
- 29214330
- Grade
- AR grade
- Product Form
- Substance
Melting point: 129-131 °C; Boiling point: 300 °C; Flash point: 244 °C; Density: 1.234 g/cu cm; Solubility: In water, 1,300 mg/L at 25 °C.
- Appearance
- Colorless; in technical grades also brownish flakes
- Shelf Life
- 2 years
- Packaging
- Available in: 25 gm glass bottle, 100 gm glass bottle, 500 gm glass bottle
- Storage
- Separated from strong oxidants and food and feedstuffs. Well closed. Store in an area without drain or sewer access. Provision to contain effluent from fire extinguishing.
1.1 — Product identifier
- Chemical Name
- o-Tolidine
- Catalogue No.
- AL4588
- Product form
- Substance
- CAS Number
- 119-93-7
- EC Number
- 204-358-0
- Grade
- AR grade
- EC Index Number
- 612-007-00-8
- Chemical Formula
- C14H16N2
- HSN Code
- 29214330
- Synonyms
- 2,4-Diaminotoluene
1.2 — Relevant identified uses of the substance or mixture and uses advised against
- Use of the substance/mixture
- Reagent for halogen and gold detection
- Uses advised against
- Not specified
1.3 — Details of the supplier of the safety data sheet
- Company identification
- Address:- 102, B wing, Savgan Heights, RTO Lane,Andheri (W), Mumbai-400 053Maharashtra, India.
1.4 — Emergency Contact Details
- Phone / e-Mail
- Phone : +91 22 26317055 Mobile : +91 9820385757 e-mail : info@alphachemika.co.in
2.1 — Classification of the substance or mixture
- Classification according to Regulation (EC) No 1272/2008
- Acute Tox. 4; Carc. 1B; Aquatic Chronic 2
- Classification source
- ECHA C&L Inventory via PubChem CID 8413 - hazard classes notified by at least 50% of companies; pictograms and signal word derived from those statements
2.2 — Label elements
- Hazard pictograms
- Irritant, Health Hazard, Environmental Hazard
- Signal word
- Danger
- Hazard statements
- H302: Harmful if swallowed; H350: May cause cancer; H411: Toxic to aquatic life with long lasting effects
- Precautionary statements
- P203, P264, P270, P273, P280, P301+P317, P318, P330, P391, P405, P501
2.3 — Other hazards
- Other hazards
- Suspected carcinogen; handle with gloves and protective equipment.
3.1 — Substance
- Name
- o-Tolidine
- CAS No.
- 119-93-7
4.1 — Description of first aid measures
- First-aid measures after inhalation
- If this chemical has been inhaled, remove the exposed person to fresh air at once. If breathing has stopped, perform artificial respiration. Keep the person warm and at rest.
- First-aid measures after skin contact
- If this chemical contacts the skin, immediately flush the contaminated skin with soap and water. If this chemical penetrates the clothing, immediately remove the clothing and flush the skin with water. If irritation persists after washing, get medical attention.
- First-aid measures after eye contact
- If this chemical contacts the eyes, immediately wash (irrigate) the eyes with large amounts of water, occasionally lifting the lower and upper lids. Get medical attention immediately.
- First-aid measures after ingestion
- If this chemical has been swallowed, get medical attention immediately.
4.2 — Most important symptoms and effects, both acute and delayed
- Symptoms relating to use
- May cause skin and eye irritation; inhalation may cause respiratory issues.
4.3 — Indication of any immediate medical attention and special treatment needed
- General information
- Treat symptomatically. Show this safety data sheet to the treating physician.
5.1 — Extinguishing media
- Suitable extinguishing media
- Water spray, carbon dioxide, dry chemical powder, foam.
- Unsuitable extinguishing media
- Not specified
5.2 — Special hazards arising from the substance or mixture
- Special procedures
- Combustible material; may produce toxic fumes when burned.
5.3 — Advice for firefighters
- Protection during firefighting
- Do not enter fire area without proper protective equipment, including respiratory protection.
6.1.1 — For non-emergency personnel
- Emergency procedures
- Contain spill and collect using appropriate protective equipment. Dispose of in accordance with local regulations.
6.3 — Methods and material for containment and cleaning up
- Methods for cleaning up
- Personal protection: chemical protection suit including self-contained breathing apparatus. Do NOT let this chemical enter the environment. Sweep spilled substance into sealable containers. If appropriate, moisten first to prevent dusting.
6.4 — Reference to other sections
- Reference
- Not specified
7.1 — Precautions for safe handling
- Precautions for safe handling
- Avoid contact with skin and eyes. Use in a well-ventilated area and wear appropriate protective equipment.
- Hygiene measures
- Wash hands and other exposed areas with mild soap and water before eating, drinking or smoking and when leaving work.
7.2 — Conditions for safe storage, including any incompatibilities
- Storage conditions
- Separated from strong oxidants and food and feedstuffs. Well closed. Store in an area without drain or sewer access. Provision to contain effluent from fire extinguishing.
8.2 — Exposure controls
- Hand protection
- Protective gloves (e.g. nitrile rubber)
- Eye protection
- Chemical safety goggles or safety glasses
- Skin and body protection
- Wear suitable protective clothing
- Respiratory protection
- Use appropriate respiratory protection if ventilation is inadequate.
9.1 — Information on basic physical and chemical properties
- Physical state
- Solid
- Colour
- White to pale gray
- Odour
- Mild
- Odour threshold
- No data available
- pH value
- No data available
- Relative evaporation rate (butylacetate=1)
- No data available
- Melting point
- 129-131 °C
- Freezing point
- No data available
- Boiling point
- 300 °C
- Flash point
- 244 °C
- Auto-ignition temperature
- 526 °C
- Decomposition temperature
- No data available
- Flammability (solid, gas)
- Combustible
- Vapour pressure
- No data available
- Relative vapour density at 20°C
- No data available
- Density
- 1.234 g/cu cm
- Solubility
- In water, 1,300 mg/L at 25 °C
- Log Pow
- 2.34
- Viscosity, kinematic
- No data available
- Viscosity, dynamic
- No data available
- Explosive properties
- No data available
- Oxidising properties
- No data available
- Explosive limits
- No data available
10.1 — Reactivity
- Reactivity
- Stable under normal conditions; avoid strong oxidizing agents.
10.2 — Chemical stability
- Chemical stability
- Stable under recommended storage conditions.
10.3 — Possibility of hazardous reactions
- Possibility of hazardous reactions
- Decomposes on burning. This produces toxic fumes including nitrogen oxides. Reacts with oxidants.
10.4 — Conditions to avoid
- Conditions to avoid
- Avoid contact with incompatible materials and excessive heat.
10.5 — Incompatible materials
- Incompatible materials
- Strong oxidizers, strong acids.
10.6 — Hazardous decomposition products
- Hazardous decomposition products
- When heated to decomposition it emits toxic fumes of nitrogen oxides.
11.1 — Information on toxicological effects
- Acute toxicity
- LD50 (oral, rat) > 2000 mg/kg; may cause harmful effects if ingested in large quantities.
- Skin corrosion/irritation
- Not classified (based on available data)
- Serious eye damage/irritation
- Not classified (based on available data)
- Respiratory or skin sensitisation
- Not classified (based on available data)
- Germ cell mutagenicity
- Not classified (based on available data)
- Carcinogenicity
- H350: May cause cancer
- Specific target organ toxicity (single exposure)
- Not classified (based on available data)
- Specific target organ toxicity (repeated exposure)
- Not classified (based on available data)
12.1 — Toxicity
- Toxicity information
- Not specified
12.2 — Persistence - degradability
- Persistence - degradability
- Not specified
12.3 — Bioaccumulative potential
- Bioaccumulative potential
- Not specified
12.4 — Mobility in soil
- Mobility in soil
- Not specified
12.6 — Other adverse effects
- Environmental precautions
- Not specified
13.1 — Waste treatment methods
- Additional Info
- Dispose of contents/container in accordance with local, regional, national and international regulations.
14.1 — UN number
- UN-No. (ADR)
- 3077
- UN-No. (IMDG)
- 3077
- UN-No. (IATA)
- 3077
- UN-No. (ADN)
- 3077
- UN-No. (RID)
- 3077
14.2 — UN proper shipping name
- Proper Shipping Name (ADR)
- Environmentally hazardous substance, solid, n.o.s.
- Proper Shipping Name (IMDG)
- Environmentally hazardous substance, solid, n.o.s.
- Proper Shipping Name (IATA)
- Environmentally hazardous substance, solid, n.o.s.
- Proper Shipping Name (ADN)
- Environmentally hazardous substance, solid, n.o.s.
- Proper Shipping Name (RID)
- Environmentally hazardous substance, solid, n.o.s.
14.3 — Transport hazard class(es)
- Transport hazard class(es)
- 9
14.4 — Packing group
- Packing group (ADR)
- III
- Packing group (IMDG)
- III
- Packing group (IATA)
- III
- Packing group (ADN)
- III
- Packing group (RID)
- III
14.5 — Environmental hazards
- Dangerous for the environment
- Not specified
- Marine pollutant
- Not specified
- Other information
- No supplementary information available
15.1 — Safety, health and environmental regulations/legislation specific for the substance or mixture
- 15.1.1 EU-Regulations
- Not specified
o-Tolidine is primarily utilized as a colorimetric reagent in analytical chemistry for the detection of free chlorine, gold, and other halogens in water quality testing. Its applications extend to various fields, including environmental monitoring, food safety testing, and industrial quality control. In addition to its use in detecting halogens, o-tolidine is also employed in the determination of certain metal ions, making it valuable in metallurgical analysis. Furthermore, its role in classical qualitative testing underscores its importance in educational laboratories for teaching fundamental analytical techniques.
ISO 9001
ISO 14001
GMP
COA with every batch
- Batch Number
- AL-2026-AL01523
- Manufacturing Date
- September-2026
- Expiry Date
- September-2031
- Molecular Weight
- 212.30 g/mol
| Test | Standard | Observed |
|---|---|---|
| Assay | ≥ 98% | 99.5% |
| Melting Point | 60-62 °C | 61 °C |
| Moisture Content | ≤ 0.5% | 0.3% |
| Residue on Ignition | ≤ 0.1% | 0.05% |
| Related Substances | None detected | None detected |
The above product is expected to comply with AR grade grade specification.
Technical Data Sheet
| Grade | Assay/Purity | Melting/Boiling Point | Moisture/LOD | Residue on Ignition | Related Substances | Solubility |
|---|---|---|---|---|---|---|
| 98% AR | ≥ 98% | m.p. 129-131 °C; b.p. 300 °C | ≤ 0.5% | ≤ 0.1% | None detected | In water, 1,300 mg/L at 25 °C |
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