Hydroquinone
- CAS Number
- 123-31-9
- HSN Code
- 29072200
- Molecular Formula
- C6H6O2
- Catalogue Number
- AL2470
- Purity
- 99-101%
- Molecular Weight
- 110.11 g/mol
Complies with : IP | BP | USP | EP | ACS
ISO 9001
ISO 14001
GMP
COA with every batch
Key Properties
Hydroquinone is a benzenediol comprising benzene core carrying two hydroxy substituents para to each other. It has a role as an antioxidant, a cofactor, a carcinogenic agent, a mouse metabolite, a human xenobiotic metabolite, an Escherichia coli metabolite and a skin lightening agent.
Also known as 1,4-Benzenediol, Quinol.
- Catalogue No.
- AL2470
- CAS Number
- 123-31-9
- Molecular Formula
- C6H6O2
- Molecular Weight
- 110.11 g/mol
- HSN Code
- 29072200
- Grade
- 99-101%, For Synthesis
- Product Form
- Substance
Melting point: 170-171 °C; Boiling point: 285-287 °C; Flash point: 165 °C; Density: 1.330 g/cu cm at 20 °C; Solubility: In water, 72,000 mg/L at 25 °C.
- Appearance
- White crystals
- Shelf Life
- 2 years
- Packaging
- Available in: 100 gm plastic bottle, 500 gm plastic bottle, 5 Kg plastic container
- Storage
- Separated from strong bases and food and feedstuffs.
1.1 — Product identifier
- Chemical Name
- Hydroquinone
- Catalogue No.
- AL2470
- Product form
- Substance
- CAS Number
- 123-31-9
- EC Number
- 204-617-8
- Grade
- 99-101%, For Synthesis
- EC Index Number
- 604-005-00-4
- Chemical Formula
- C6H6O2
- HSN Code
- 29072200
- Synonyms
- 1,4-Benzenediol, Quinol
1.2 — Relevant identified uses of the substance or mixture and uses advised against
- Use of the substance/mixture
- Photographic developer, polymerization inhibitor
- 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; Skin Sens. 1; Eye Dam. 1; Muta. 2; Carc. 2; Aquatic Acute 1
- Classification source
- ECHA C&L Inventory via PubChem CID 785 - hazard classes notified by at least 50% of companies; pictograms and signal word derived from those statements
2.2 — Label elements
- Hazard pictograms
- Corrosive, Irritant, Health Hazard, Environmental Hazard
- Signal word
- Danger
- Hazard statements
- H302: Harmful if swallowed; H317: May cause an allergic skin reaction; H318: Causes serious eye damage; H341: Suspected of causing genetic defects; H351: Suspected of causing cancer; H400: Very toxic to aquatic life
2.3 — Other hazards
- Other hazards
- May cause skin sensitization and respiratory irritation.
3.1 — Substance
- Name
- Hydroquinone
- CAS No.
- 123-31-9
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, flush the contaminated skin with water. Where there is evidence of skin irritation, 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
- Skin irritation, respiratory irritation, potential allergic reactions.
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
- Use water spray, alcohol-resistant foam, dry chemical or carbon dioxide.
- Unsuitable extinguishing media
- Not specified
5.2 — Special hazards arising from the substance or mixture
- Special procedures
- Special hazards arising from the substance or mixture: Carbon oxides.
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 inert absorbent material. Dispose of in accordance with local regulations.
6.3 — Methods and material for containment and cleaning up
- Methods for cleaning up
- Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Sweep spilled substance into covered sealable containers. Carefully collect remainder.
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.
- 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 bases and food and feedstuffs.
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
- Odour
- Odorless
- Odour threshold
- Not applicable
- pH value
- Not applicable
- Relative evaporation rate (butylacetate=1)
- Not applicable
- Melting point
- 170-171 °C
- Freezing point
- Not applicable
- Boiling point
- 285-287 °C
- Flash point
- 165 °C
- Auto-ignition temperature
- 960 °F (516 °C)
- Decomposition temperature
- Not applicable
- Flammability (solid, gas)
- Not flammable
- Vapour pressure
- 1.9X10-5 mm Hg at 25 °C
- Relative vapour density at 20°C
- 3.81 (Air = 1)
- Density
- 1.330 g/cu cm at 20 °C
- Solubility
- In water, 72,000 mg/L at 25 °C
- Log Pow
- 0.59
- Viscosity, kinematic
- Not applicable
- Viscosity, dynamic
- Not applicable
- Explosive properties
- Not explosive
- Oxidising properties
- Not oxidizing
- Explosive limits
- Not applicable
10.1 — Reactivity
- Reactivity
- Stable under normal conditions; avoid strong oxidizing agents.
10.2 — Chemical stability
- Chemical stability
- Its solution becomes brown in air due to oxidation.
10.3 — Possibility of hazardous reactions
- Possibility of hazardous reactions
- Reacts violently with sodium hydroxide.
10.4 — Conditions to avoid
- Conditions to avoid
- Avoid contact with incompatible materials and excessive heat.
10.5 — Incompatible materials
- Incompatible materials
- Strong oxidizing agents, strong acids.
10.6 — Hazardous decomposition products
- Hazardous decomposition products
- Not specified
11.1 — Information on toxicological effects
- Acute toxicity
- LD50 Rat oral 320 mg/kg; LD50 Rat intraperitoneal 170 mg/kg; LD50 Rat intravenous 115 mg/kg
- Skin corrosion/irritation
- Not classified (based on available data)
- Serious eye damage/irritation
- H318: Causes serious eye damage
- Respiratory or skin sensitisation
- H317: May cause an allergic skin reaction
- Germ cell mutagenicity
- H341: Suspected of causing genetic defects
- Carcinogenicity
- H351: Suspected of causing 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)
- Hydroquinone
- Proper Shipping Name (IMDG)
- Hydroquinone
- Proper Shipping Name (IATA)
- Hydroquinone
- Proper Shipping Name (ADN)
- Hydroquinone
- Proper Shipping Name (RID)
- Hydroquinone
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
Used as a photographic developing agent and as a polymerization inhibitor for storing reactive monomers.
ISO 9001
ISO 14001
GMP
COA with every batch
- Batch Number
- AL-2026-AL00813
- Manufacturing Date
- September-2026
- Expiry Date
- September-2031
- Molecular Weight
- 110.11 g/mol
| Test | Standard | Observed |
|---|---|---|
| Assay | 99.0% min | 99.7% |
| Melting Point | 172-174 °C | 173 °C |
| Moisture Content | 0.5% max | 0.3% |
| Residue on Ignition | 0.1% max | 0.05% |
| Related Substances | None detected | None detected |
| Solubility | Soluble in water | Fully soluble in water at room temperature. |
The above product is expected to comply with 99-101%, For Synthesis grade specification.
Technical Data Sheet
| Grade | Assay/Purity | Melting/Boiling Point | Moisture/LOD | Residue on Ignition | Related Substances | Solubility |
|---|---|---|---|---|---|---|
| 99-101%, For Synthesis | 99-101% | m.p. 170-171 °C; b.p. 285-287 °C | 0.5% max | 0.1% max | None detected | In water, 72,000 mg/L at 25 °C |
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