Product Name: DOPO-HQ
Chemical Name: 6-(Hydroxy(phenyl)methyl)-6H-dibenzo[c,e][1,2]oxaphosphinine-6-oxide
Synonyms: DOPO-based flame retardant, DOPO-HQ
CAS Number: 99208-50-1
Relevant Uses: Added to polymers and resins for flame resistance in electronics, automotive parts, consumer products
Manufacturer Contact: Listed on product label/packaging
Emergency Contact: National or local chemical emergency number; refer to supplier sheet for specifics
Classification: Eye irritation category 2, skin irritation category 2, acute toxicity (oral) category 4
Main Hazards: Causes moderate eye and skin irritation; dust may cause respiratory irritation; ingestion leads to toxicity symptoms
Label Elements: Warning, exclamation mark symbol
Precautionary Statements: Avoid breathing dust/fume, wash hands thoroughly after use, wear protective gear; in case of contact, rinse with water
Chemical Components:
DOPO-HQ (6-(Hydroxy(phenyl)methyl)-6H-dibenzo[c,e][1,2]oxaphosphinine-6-oxide), >98%
Impurities: Trace synthesis byproducts (each <1%), identified upon request
Formulation: Powder or granular additive, free-flowing, sometimes with anti-caking agent (usually silica, <0.1%)
Eye Contact: Rinse under running water continually for at least 15 minutes, remove any lenses gently; consult a doctor if irritation persists
Skin Contact: Wash thoroughly with soap and water, take off contaminated clothing, seek help if rash appears
Inhalation: Move individual to fresh air, maintain breathing, get medical attention if symptoms like coughing or dizziness develop
Ingestion: Rinse mouth thoroughly, drink water only if conscious, consult a physician immediately
Advice for Doctors: Symptomatic treatment only; no specific antidote
Suitable Extinguishing Media: Water spray, foam, dry chemical, carbon dioxide
Unsuitable Media: Direct water jet against burning product may spread fire
Fire Hazards: Decomposition generates toxic fumes, including phosphorous oxides, carbon monoxide, carbon dioxide
Protective Equipment: Self-contained breathing apparatus, full turnout gear
Firefighting Advice: Approach from upwind, avoid inhaling toxic fumes, cool exposed containers with water spray
Personal Precautions: Wear dust mask (P2 filter), goggles, gloves; avoid skin and eye contact
Environmental Precautions: Prevent spillage from entering drains, water bodies, or soil
Cleanup Methods: Scoop up or vacuum spilled product, shovel into labeled waste containers, wipe area with damp cloth
Disposal: Collect waste for chemical disposal by licensed contractors
Safe Handling: Use local ventilation to control dust levels; avoid eating, drinking, smoking while handling
Storage Requirements: Store in cool, dry, well-ventilated spaces away from strong acids, alkalis, and oxidizing substances; keep containers tightly sealed
Packaging: Sealed HDPE drums, fiber cartons, or multi-layer bags suitable for solids
Exposure Limits: No established OSHA or ACGIH specific limit; recommend treating dust as nuisance with 10 mg/m³ (total dust) guideline
Engineering Controls: Use local exhaust or general ventilation to reduce airborne dust
Personal Protection: Dust-resistant safety glasses, nitrile gloves, long sleeves, disposable dust mask (N95 or P2)
Hygiene Measures: Wash hands after handling, do not take contaminated work clothing home
Appearance: Off-white to pale yellow crystalline powder
Odor: Faint, almost odorless
Melting Point: 210–218°C
Boiling Point: Not applicable (decomposes)
Solubility: Low in water, moderately soluble in organic solvents like acetone
Density: 1.25 g/cm³
Vapor Pressure: Negligible at room temperature
Flash Point: >300°C
pH: Not applicable for a solid
Other: Stable under standard handling but sensitive to strong oxidizers
Chemical Stability: Stable at recommended storage and use conditions
Reactivity: Reacts with strong oxidizing agents, acids, or alkalis
Hazardous Decomposition: Emits phosphorous oxides, carbon oxides, and phenolic fumes if heated or burned
Polymerization: Product does not polymerize spontaneously
Incompatibilities: Avoid contact with nitric acid, chlorinating agents
Routes of Exposure: Eyes, skin, ingestion, inhalation
Acute Effects: Irritation to eyes and skin; ingestion leads to gastrointestinal symptoms (nausea, vomiting)
Chronic Effects: Data limited; long-term exposure to dust may affect respiratory function
Sensitivities: No sensitization reported in standard animal tests
Carcinogenicity: No classification by IARC, NTP, or OSHA
Ecotoxicity: Low expected toxicity to aquatic organisms at use levels; direct large releases harmful
Persistence/Degradability: Product breaks down slowly in the environment; not readily biodegradable
Bioaccumulation: Potential limited; product not expected to accumulate in aquatic organisms
Mobility: Low mobility in soil due to low water solubility
Waste Handling: Treat as hazardous chemical waste, do not discharge into drains or waterways
Method: Incineration at authorized facility preferred, with scrubbing for phosphorous and acid gases
Packaging: Contaminated packaging treated as product waste and disposed of similarly
UN Number: Not classified as dangerous goods for transport
Transport Hazard Class: None
Proper Shipping Name: Flame retardant, solid, not otherwise specified
Packing Group: Not regulated
Transport Precautions: Avoid moisture, high temperature, secure packaging to prevent spillage
GHS Labeling: Pictogram: exclamation mark; hazard and precaution statements as above
TSCA Status (US): Appears on inventory
REACH (EU): Registration/notification required, consult supplier
Other: No substance-specific workplace restrictions, but local environmental release limits may apply
