o-Tolidine
- CAS Number
- 119-93-7
- HSN Code
- 29214330
- Molecular Formula
- C14H16N2
- Catalogue Number
- AL01523
- 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
o-Tolidine (AR, powder) is a substituted diamine that serves as a vital reagent in analytical chemistry, particularly for the detection of halogens and gold in various samples. This compound is notable for its high purity of 98%, making it suitable for rigorous laboratory applications. With a molecular formula of C14H16N2 and a molecular weight of 212.30 g/mol, o-tolidine is classified as an aromatic amine, which contributes to its reactivity and utility in qualitative testing. Its ability to form colored complexes with halogens and gold ions makes it an essential tool in water quality analysis and other analytical procedures.
Also known as 2,4-Diaminotoluene.
- Catalogue No.
- AL01523
- CAS Number
- 119-93-7
- Molecular Formula
- C14H16N2
- Molecular Weight
- 212.30 g/mol
- HSN Code
- 29214330
- Grade
- AR grade
- Product Form
- Substance
o-Tolidine appears as a white to pale gray crystalline powder that is known to darken upon exposure to air and light, indicating its sensitivity to environmental conditions. The compound has a melting point of approximately 60-62 °C and a boiling point of around 290 °C. It is slightly soluble in water but more readily soluble in organic solvents such as ethanol and ether. The density of o-tolidine is approximately 1.1 g/cm³. Its characteristic odor is mild and not overpowering, making it manageable in laboratory settings. Due to its chemical structure, it is important to handle this compound with care to avoid degradation and ensure accurate results in testing.
- Appearance
- White to pale gray crystalline powder
- Shelf Life
- 2 years
- Packaging
- Available in 100 g and 500 g glass bottles
- Storage
- Store in a cool, dry place, away from light and moisture.
1.1 — Product identifier
- Chemical Name
- o-Tolidine
- Catalogue No.
- AL01523
- Product form
- Substance
- CAS Number
- 119-93-7
- EC Number
- 204-404-2
- 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
2.3 — 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
- Move to fresh air. If symptoms persist, seek medical attention.
- First-aid measures after skin contact
- Wash with soap and water. If irritation occurs, seek medical attention.
- First-aid measures after eye contact
- Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do. If irritation persists, seek medical attention.
- First-aid measures after ingestion
- Do not induce vomiting. Rinse mouth and seek 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
- Use appropriate personal protective equipment. Sweep up and place in a suitable container for disposal.
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
- Store in a tightly closed container in a cool, dry place, away from light and incompatible materials.
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
- 60-62 °C
- Freezing point
- No data available
- Boiling point
- 290 °C
- Flash point
- No data available
- Auto-ignition temperature
- No data available
- Decomposition temperature
- No data available
- Flammability (solid, gas)
- Combustible
- Vapour pressure
- No data available
- Relative vapour density at 20°C
- No data available
- Density
- 1.1 g/cm³
- Solubility
- Slightly soluble in water; soluble in organic solvents
- Log Pow
- No data available
- 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
- No dangerous reactions known under normal conditions of use.
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
- Not specified
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
- Causes skin irritation.
- Serious eye damage/irritation
- Causes serious eye irritation.
- Respiratory or skin sensitisation
- May cause allergic skin reactions in sensitive individuals.
- Germ cell mutagenicity
- Not classified
- Carcinogenicity
- Not classified
- Specific target organ toxicity (single exposure)
- May cause respiratory irritation.
- Specific target organ toxicity (repeated exposure)
- Not classified
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% | 60-62 °C | ≤ 0.5% | ≤ 0.1% | None detected | Slightly soluble in water, soluble in organic solvents |
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