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Product Name: DPX Mountant
Common Names: Dibutyl Phthalate/Xylene Mounting Medium
Product Use: Mounting biological specimens on microscope slides
Manufacturer: Laboratory supply companies serving research and medical fields
Emergency Contact: Chemtrec; emergency telephone listed by supplier
CAS Numbers: Dibutyl Phthalate: 84-74-2, Xylene: 1330-20-7
Synonyms: No widely-used alternative synonyms for DPX as a prepared mixture
Danger Pictograms: Health hazard, Flammable, Irritant
Signal Word: Danger
Hazard Statements: Highly flammable liquid and vapor; Harmful if inhaled, swallowed, or absorbed through skin; Suspected of damaging fertility; Causes eye, skin, and respiratory irritation
Precautionary Statements: Avoid breathing vapors; Use only outdoors or in a well-ventilated area; Wear appropriate gloves, eye protection, protective clothing
Potential Symptoms: Dizziness, drowsiness, headache, skin dryness, eye irritation, upper airway irritation
Chronic Hazards: Prolonged or repeated exposure may damage liver, kidneys, reproductive organs; Chronic inhalation may impact central nervous system
Dibutyl Phthalate: 25-35% by volume, CAS No. 84-74-2
Xylene: 50-70% by volume, CAS No. 1330-20-7
Rosin: 5-15% by volume, CAS No. 8050-09-7
Impurities: Trace materials introduced through glassware, stabilizers, and environment
Mixture Nature: Components are dissolved together as a solution, not as individual solids
Inhalation: Remove person to fresh air, keep comfortable and warm; oxygen or artificial respiration if breathing is difficult
Skin Contact: Remove contaminated clothing, rinse skin with running water and non-abrasive soap for at least 15 minutes; seek medical attention for persistent irritation
Eye Contact: Rinse cautiously with water for at least 15 minutes, lifting eyelids occasionally; flush with isotonic saline if available; contact medical professionals
Ingestion: Rinse mouth thoroughly; do not induce vomiting; seek immediate medical advice; monitor for symptoms such as nausea, vomiting, dizziness, or confusion
Advice for Physician: Treat symptoms, monitor kidney, nervous system, and liver functions
Suitable Extinguishing Media: Dry chemical, carbon dioxide, foam, water spray
Unsuitable Media: Direct high-pressure water stream may cause chemical to splatter
Special Hazards: Toxic fumes of carbon oxides, phthalic anhydride, and unburned hydrocarbons
Protective Equipment: Self-contained breathing apparatus, full protective gear
Fire/Explosion Risk: Vapors form explosive mixtures with air, flashback possible; containers may explode under heat
Firefighting Procedures: Move containers from fire area only if safe; cool exposed vessels with water spray
Personal Precautions: Evacuate area, eliminate sources of ignition, ventilate area, avoid breathing vapors and contact with skin
Protective Equipment: Chemical splash goggles, solvent-resistant gloves, respirator if risk of inhalation
Environmental Precautions: Prevent entry to waterways, drains, soil
Methods for Cleaning Up: Absorb with inert material such as sand or vermiculite; collect into labeled containers; secure for disposal per local regulations; flush contaminated area with water after main spill picked up
Handling: Use only with adequate ventilation and proper protective gear; avoid ingestion, inhalation, or skin/eye contact; keep away from heat, sparks, open flames, and static discharge; ground/bond container and transfer equipment
Storage: Store in original, tightly sealed chemical-resistant containers; keep away from direct sunlight and incompatible substances such as strong oxidizers and acids; store at room temperature in a cool, well-ventilated location; post hazard-warning signs clearly
Incompatibilities: Strong oxidizers, strong acids, alkali metals
Exposure Limits: Xylene ACGIH TLV: 100 ppm TWA, Dibutyl Phthalate ACGIH TLV: 5 mg/m3 TWA
Engineering Controls: Laboratory fume hood, local exhaust ventilation, explosion-proof electrical fixtures
Personal Protective Equipment: Chemical splash goggles, nitrile or neoprene gloves, flame-retardant lab coat, organic vapor respirator (if ventilation inadequate), closed-toe shoes
Hygiene Measures: Wash hands and arms thoroughly after handling; remove contaminated clothing and wash before reuse
Appearance: Clear, colorless to pale yellow viscous liquid
Odor: Aromatic hydrocarbon, characteristic pungent odor
Odor Threshold: Recognizable at low (sub-ppm) concentrations in air
pH: Not applicable, non-aqueous
Melting Point/Freezing Point: Below 0°C
Boiling Point/Range: 136-143°C for xylene, higher for other components
Flash Point: 25°C (xylene)
Evaporation Rate: Moderate, varies by ventilation and component ratio
Flammability: Flammable liquid
Vapor Pressure: 7-9 mm Hg at 20°C (mainly from xylene)
Vapor Density (air=1): 3.7 (xylene)
Specific Gravity: 1.0–1.05
Solubility: Insoluble in water; miscible with most organic solvents
Partition Coefficient (Log Kow): Xylene 3.12, Dibutyl Phthalate 4.5
Auto-Ignition Temperature: 450°C (xylene)
Decomposition Temperature: Above 200°C (may release toxic fumes)
Chemical Stability: Stable at normal temperatures and pressures, sensitive to light
Reactivity: Reacts with strong oxidizers and acids
Hazardous Reactions: Exothermic polymerization unlikely but possible under strong acid catalysis
Decomposition Products: Carbon monoxide, carbon dioxide, phthalic anhydride, other organics
Incompatible Materials: Strong oxidizers (potassium permanganate, nitric acid), alkali metals, sulfuric acid
Conditions to Avoid: Excess heat, sparks, flames, direct sunlight, poor ventilation
Likely Routes of Exposure: Inhalation, skin contact, ingestion, eye contact
Acute Toxicity: Xylene LD50 oral rat: 4300 mg/kg; Dibutyl Phthalate LD50 oral rat: 8000 mg/kg
Skin/Eye Irritation: Both components cause moderate to severe irritation to skin and eyes
Respiratory Effects: Inhalation may cause headache, dizziness, nausea, central nervous system depression
Chronic Toxicity: Prolonged exposure linked to liver, kidney, reproductive organ damage (particularly with dibutyl phthalate)
Carcinogenicity: IARC: Xylene – Group 3 (not classifiable), Dibutyl Phthalate – not classified; no clear evidence but chronic studies limited
Mutagenicity: No strong evidence from standard testing
Reproductive Toxicity: Dibutyl Phthalate classified as toxic to reproduction (impacts sperm quality and implantation in animal studies)
Other Target Organs: Liver, kidneys, central nervous system
Aquatic Toxicity: Xylene and dibutyl phthalate both toxic to aquatic life; LC50 (fish) for xylene: 13 mg/l/96h; Dibutyl phthalate: 2 mg/l/96h
Persistence and Degradability: Xylene moderately degradable, dibutyl phthalate less readily biodegradable
Bioaccumulation Potential: Dibutyl phthalate likely bioaccumulates, especially in aquatic food chains
Ecotoxicological Effects: Harmful to plankton, benthic organisms; may disrupt endocrine function in wildlife
Mobility in Soil: Not particularly mobile; tends to adsorb to sediment particles
Other Adverse Effects: Toxic to aquatic invertebrates, may affect long-term aquatic ecosystem balance
Waste Disposal: Treat as hazardous chemical waste; collect in sealed chemical-resistant containers for incineration at licensed facilities; never pour down drain or release to sewage
Contaminated Packaging: Triple rinse containers; treat washings and rinsates as hazardous waste
Precautions: Comply with local, regional, and national hazardous waste regulations; avoid incinerating with metals or halogenated materials
Recommended Disposal: Shipment to certified chemical waste disposal company
UN Numbers: UN1307 (xylene), UN3082 (Environmental hazard mixture)
Proper Shipping Name: Xylene mixtures, Flammable liquid, n.o.s. (contains dibutyl phthalate)
Hazard Class: 3 (Flammable liquid)
Packing Group: III
Labelling Requirements: Flammable liquid labels; environmental hazard symbol for overseas shipment
Special Transport Precautions: Avoid direct sunlight and temperatures above 30°C during transit; ship upright, secure containers to prevent leaks
Transport Regulations: Subject to ADR/RID, IMDG, ICAO/IATA rules for hazardous chemicals
EU Regulations: REACH candidate list (dibutyl phthalate); CLP classification: Flammable, Toxic for reproduction, Harmful to aquatic life
USA Regulations: Xylene and dibutyl phthalate listed on TSCA inventory; subject to SARA Title III reporting; dibutyl phthalate under California Proposition 65 (developmental toxicity)
Canada: Listed on DSL; subject to WHMIS hazardous product labeling
Australia: AICS inventory listed
Workplace Regulations: Employers must provide training in safe handling, spill response, personal protective equipment; chemical hygiene plans required in laboratories and clinics
Other Information: Consult local rules for hazardous chemical use and disposal in academic, clinical, or research environments
