Hydroquinone monomethyl ether
- CAS Number
- 150-76-5
- HSN Code
- 29094900
- Molecular Formula
- C7H8O2
- Catalogue Number
- AL2476
- Purity
- ≥ 99%
- Molecular Weight
- 124.14 g/mol
Complies with : IP | BP | USP | EP | ACS
ISO 9001
ISO 14001
GMP
COA with every batch
Key Properties
P-methoxyphenol is a member of phenols and a member of methoxybenzenes. It has a role as a metabolite.
Also known as 4-Methoxyphenol, MEHQ.
- Catalogue No.
- AL2476
- CAS Number
- 150-76-5
- Molecular Formula
- C7H8O2
- Molecular Weight
- 124.14 g/mol
- HSN Code
- 29094900
- Grade
- 99% For Synthesis
- Product Form
- Substance
Melting point: 54 °C; Boiling point: 253 °C; Flash point: 270 °F (132 °C) (Open Cup); Density: 1.55 at 20 °C/20 °C; Solubility: In water, 19,500 mg/L at 25 °C.
- Appearance
- Plates
- Shelf Life
- 2 years
- Packaging
- Available in: 100 gm plastic bottle, 250 gm plastic bottle
- Storage
- Separated from strong oxidants, strong bases, acid anhydrides and acid chlorides.
1.1 — Product identifier
- Chemical Name
- Hydroquinone monomethyl ether
- Catalogue No.
- AL2476
- Product form
- Substance
- CAS Number
- 150-76-5
- EC Number
- 205-769-8
- Grade
- 99% For Synthesis
- EC Index Number
- 604-005-00-4
- Chemical Formula
- C7H8O2
- HSN Code
- 29094900
- Synonyms
- 4-Methoxyphenol, MEHQ
1.2 — Relevant identified uses of the substance or mixture and uses advised against
- Use of the substance/mixture
- 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 Irrit. 2
- Classification source
- ECHA C&L Inventory via PubChem CID 9015 - hazard classes notified by at least 50% of companies; pictograms and signal word derived from those statements
2.2 — Label elements
- Hazard pictograms
- Irritant
- Signal word
- Warning
- Hazard statements
- H302: Harmful if swallowed; H317: May cause an allergic skin reaction; H319: Causes serious eye irritation
2.3 — Other hazards
- Other hazards
- May cause skin sensitization.
3.1 — Substance
- Name
- Hydroquinone monomethyl ether
- CAS No.
- 150-76-5
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
- Skin irritation, respiratory irritation, eye irritation.
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
- Dust explosion possible if in powder or granular form, mixed with air.
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. Sweep spilled substance into covered sealable containers. Carefully collect remainder. Then store and dispose of according to local regulations.
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 gloves and safety goggles when handling.
- 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, strong bases, acid anhydrides and acid chlorides.
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
- For nuisance exposures use type P95 (US) or type P1 (EU EN 143) particle respirator. For higher level protection use type OVAGP99 (US) or type ABEK-P2 (EU EN 143) respirator cartridges.
9.1 — Information on basic physical and chemical properties
- Physical state
- Solid
- Colour
- White
- Odour
- Odor of caramel and phenol
- Odour threshold
- Not determined
- pH value
- Not applicable
- Relative evaporation rate (butylacetate=1)
- Not determined
- Melting point
- 54 °C
- Freezing point
- Not determined
- Boiling point
- 253 °C
- Flash point
- 270 °F (132 °C) (Open Cup)
- Auto-ignition temperature
- 790 °F (421 °C)
- Decomposition temperature
- Not determined
- Flammability (solid, gas)
- Combustible
- Vapour pressure
- 6.75X10-3 mm Hg at 20 °C
- Relative vapour density at 20°C
- 4.3 (Air = 1)
- Density
- 1.55 at 20 °C/20 °C
- Solubility
- In water, 19,500 mg/L at 25 °C
- Log Pow
- 1.41 at 25 °C
- Viscosity, kinematic
- Not determined
- Viscosity, dynamic
- Not determined
- 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
- Stable under recommended storage conditions.
10.3 — Possibility of hazardous reactions
- Possibility of hazardous reactions
- Reacts with strong oxidants, strong bases, acid anhydrides and acid chlorides. The solution in water is a weak acid.
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
- When heated to decomposition it emits acrid smoke and fumes.
11.1 — Information on toxicological effects
- Acute toxicity
- LD50 Rat oral 1600 mg/kg; LD50 Mouse ip 250 mg/kg; LD50 Rabbit ip 720-790 mg/kg
- Skin corrosion/irritation
- Not classified (based on available data)
- Serious eye damage/irritation
- H319: Causes serious eye irritation
- Respiratory or skin sensitisation
- H317: May cause an allergic skin reaction
- Germ cell mutagenicity
- Not classified (based on available data)
- Carcinogenicity
- Not classified (based on available data)
- 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)
- Not assigned
- UN-No. (IMDG)
- Not assigned
- UN-No. (IATA)
- Not assigned
- UN-No. (ADN)
- Not assigned
- UN-No. (RID)
- Not assigned
14.2 — UN proper shipping name
- Proper Shipping Name (ADR)
- Not regulated
- Proper Shipping Name (IMDG)
- Not regulated
- Proper Shipping Name (IATA)
- Not regulated
- Proper Shipping Name (ADN)
- Not regulated
- Proper Shipping Name (RID)
- Not regulated
14.3 — Transport hazard class(es)
- Transport hazard class(es)
- Not classified
14.4 — Packing group
- Packing group (ADR)
- Not classified
- Packing group (IMDG)
- Not classified
- Packing group (IATA)
- Not classified
- Packing group (ADN)
- Not classified
- Packing group (RID)
- Not classified
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 the standard polymerization inhibitor (MEHQ) for stabilizing acrylate, styrene, and other reactive monomers during storage.
ISO 9001
ISO 14001
GMP
COA with every batch
- Batch Number
- AL-2026-AL2332E
- Manufacturing Date
- September-2026
- Expiry Date
- September-2031
- Molecular Weight
- 124.14 g/mol
| Test | Standard | Observed |
|---|---|---|
| Description | White waxy flakes | White waxy flakes |
| Assay (GC) | 99.0% | 99.28% |
| Melting point | 54 – 56°C | 55°C |
The above product complies with LR grade
Technical Data Sheet
| Grade | Assay/Purity | Melting/Boiling Point | Moisture/LOD | Residue on Ignition | Related Substances | Solubility |
|---|---|---|---|---|---|---|
| 99% For Synthesis | ≥ 99% | m.p. 54 °C; b.p. 253 °C | ≤ 0.5% | ≤ 0.1% | None detected | In water, 19,500 mg/L at 25 °C |
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