Product Name: 1,4-Benzenedimethanol
Other Names: para-Xylylenedimethanol, p-Xylene glycol
CAS Number: 5381-21-1
Recommended Uses: Polymer production, chemical synthesis, laboratory use
Contact Information: Chemical supplier or distributor details required on-site; emergency contact number 24-hour availability for spills
Molecular Formula: C8H10O2
Molecular Weight: 138.17 g/mol
Hazard Class: Not classified as hazardous under GHS standards but may cause irritation to eyes, skin, and respiratory tract
Signal Word: None required by GHS
Hazard Statements: May cause mild skin and eye irritation; may act as a slight irritant upon inhalation of dust
Precautionary Statements: Avoid breathing dust, use in well-ventilated areas, wear proper personal protective equipment (PPE)
Effects of Overexposure: Irritation of skin, eyes, and mucous membranes; not known to have chronic health effects based on current evidence
Chemical Name: 1,4-Benzenedimethanol
CAS Number: 5381-21-1
Concentration: 98-100%
Impurities: Trace amounts may include related aromatic alcohols, water content usually under 1%
Additives: None present
Molecular Structure: Benzene ring with two methanol groups attached at para positions
Inhalation: Remove person to fresh air immediately; observe for signs of discomfort, seek medical attention if symptoms develop
Skin Contact: Rinse affected area with plenty of running water for at least 15 minutes; remove contaminated clothing and wash before re-use
Eye Contact: Flush eyes with large amounts of water for at least 15 minutes, lifting upper and lower eyelids; seek medical attention if irritation persists
Ingestion: Rinse mouth thoroughly with water; do not induce vomiting; seek immediate medical attention
Most Important Symptoms: Mild irritation of skin or eyes, transient respiratory discomfort
Suitable Extinguishing Media: Use water spray, dry chemical, foam, or carbon dioxide
Unsuitable Media: Strong water jet
Fire Hazards: Material may combust at elevated temperatures; emits toxic fumes including carbon monoxide, carbon dioxide
Protective Equipment: Firefighters wear self-contained breathing apparatus (SCBA) and full protective clothing
Explosion Data: Dusts can form flammable mixtures with air in high concentrations; general industrial hygiene conditions prevent such occurrences
Personal Precautions: Wear gloves, safety goggles, appropriate dust mask, and protective clothing
Environmental Precautions: Prevent bulk quantities from entering drains or surface water; consult local environmental authority in the event of major spill
Clean Up Methods: Vacuum or sweep up solid material into closed containers for disposal; avoid creating airborne dust; ventilate area well
Emergency Procedures: Isolate area around spill, notify responsible authorities if environmental contamination is possible
Safe Handling: Avoid contact with eyes, skin, and clothing; wash hands after handling; minimize dust generation;
Storage Requirements: Store in cool, dry, well-ventilated area away from heat sources and incompatible materials; keep container tightly closed; direct sunlight discouraged
Materials to Avoid: Strong oxidizing agents, strong acids
Engineering Controls: Use local exhaust ventilation or general dilution ventilation to reduce airborne dust; work in chemical fume hood if possible
Personal Protection: Chemical-resistant gloves (e.g., nitrile), safety goggles or face shield, lab coat or apron
Respiratory Protection: Dust mask or respirator with particulate filter in case of dusty operations
Hygiene Measures: Do not eat, drink, or smoke while handling; wash hands thoroughly after exposure;
Exposure Limits: No established occupational exposure limits; minimize amounts handled and exposure duration
Appearance: White to off-white solid, crystalline powder or granules
Odor: Faint, characteristic odor typical of aromatic alcohols
Melting Point: 138–142°C
Boiling Point: Decomposes without boiling at atmospheric pressure
Solubility: Soluble in water to a limited extent, very soluble in organic solvents such as ethanol, methanol, acetone
Vapor Pressure: Negligible at room temperature
Density: About 1.22 g/cm³
Partition Coefficient (log Kow): Estimated around 0.5–1.0
Other Properties: Stable under normal laboratory conditions, hygroscopic in nature
Chemical Stability: Stable under standard ambient conditions, no significant polymerization or hazardous decomposition under ordinary handling
Conditions to Avoid: Extreme heat, direct sunlight, moisture, open flames, and sources of static discharge
Incompatible Materials: Strong oxidizers will lead to rapid and potentially hazardous reaction, strong acids may cause decomposition
Hazardous Decomposition Products: Carbon monoxide, carbon dioxide, possible formation of aromatic aldehydes under extreme thermal decomposition
Routes of Exposure: Eye contact, skin contact, inhalation of dust, ingestion
Acute Toxicity: Low; oral LD50 (rat) estimated >2,000 mg/kg based on similar compounds
Skin Irritation: May cause mild irritation on prolonged or repeated exposure
Eye Irritation: May cause mild transient irritation
Chronic Effects: No evidence of sensitization, carcinogenicity, mutagenicity, or reproductive toxicity found in published studies; further data may be limited
Medical Conditions Aggravated: Pre-existing respiratory or skin conditions could show increased sensitivity
Ecotoxicity: Data on aquatic life limited, expected to exhibit low to moderate aquatic toxicity based on structural similarities (expected LC50 for fish >100 mg/L)
Persistence and Degradability: Biodegradable with aerobic microorganisms; degradation rates expected to be moderate
Bioaccumulation Potential: Not expected to bioaccumulate significantly, low log Kow
Mobility in Soil: Limited data, likely moderate mobility due to some water solubility
Other Adverse Effects: Not classified as hazardous to environment with current evidence
Disposal Method: Collect as solid waste, follow site- and local regulations for chemical laboratory waste; incinerate in licensed facility if permitted
Packaging: Use sealed, labeled containers that prevent release to environment; do not mix with incompatible materials
Environmental Provision: Do not discharge concentrated solutions or major spills into surface water or sewer
UN Number: Not regulated as dangerous good under UN, ADR, IATA, IMDG guidelines
Hazard Class: Not classified
Packing Group: Not assigned
Special Precautions: Avoid creating dust during transport; keep away from foodstuffs and incompatible materials
Chemical Inventory Status: Listed on TSCA (United States), REACH (Europe), DSL (Canada), AICS (Australia), ENCS (Japan), and other major chemical inventories
GHS Classification: Not classified as hazardous
Labeling Requirements: General chemical precaution labeling recommended; adhere to local requirements
Restrictions: No specific restrictions identified based on current regulations; good chemical hygiene practice expected
