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Chemical Name: Di-N-Propyl Peroxydicarbonate
Synonyms: DNPDC, Peroxydicarbonic acid, di-n-propyl ester
Physical Form: Liquid or semi-solid depending on storage conditions
Odor: Mild, sweetish
Color: Colorless to pale yellow
CAS Number: 26322-14-5
Concentration: Up to 77% active ingredient blended with at least 23% diluent (Type B, often to help control reactivity and stability)
Hazard Classes: Organic peroxide, flammable, oxidizer, skin irritant, serious eye irritation
Acute Effects: Causes skin and eye irritation; inhalation leads to respiratory discomfort
Chronic Effects: Repeated contact dries or cracks skin; no evidence for carcinogenicity
Environmental Hazard: Toxic to aquatic life if released
NFPA Ratings: Health: 2, Flammability: 4, Reactivity: 4
Signal Word: Danger
Symptoms of Exposure: Redness, itching, stinging eyes, cough
Main Ingredient: Di-n-Propyl Peroxydicarbonate (≤77%)
Diluent (Type B): Non-reactive, typically aliphatic hydrocarbon or phthalate plasticizer (≥23%)
Impurities: Minimal, may include trace peroxides or residual propanol
Formulation Purpose: Diluent reduces hazard through stabilization and lowers explosive potential
Inhalation: Move to fresh air; if breathing troubles, consult a physician
Skin Contact: Immediately wash with soap and running water. Remove contaminated clothing
Eye Contact: Rinse gently with water for at least 15 minutes. Do not rub. Contact eye specialist if irritation persists
Ingestion: Rinse mouth, do not induce vomiting. Seek medical advice if feeling unwell or in case of large amounts
Note to Doctor: Treat symptomatically for irritation, consider oxygen for severe inhalation
Suitable Extinguishing Media: Water spray, foam, dry chemical (avoid CO2 with peroxide fires; may accelerate decomposition)
Unsuitable Media: Avoid using carbon dioxide; insufficient cooling and possible decomposition
Fire Hazards: Decomposes on heating or friction; releases flammable vapors and toxic gases (CO, CO2, organic acids)
Protective Equipment for Firefighters: Full turnout gear and self-contained breathing apparatus
Special Risks: Closed containers may explode in fire; evacuate area
Additional Notes: Runoff from fire control may cause environmental contamination
Personal Precautions: Wear impervious gloves, splash goggles, chemical-resistant clothing. Evacuate unnecessary personnel
Environmental Precautions: Prevent spillage from entering drains, watercourses, or soil
Methods for Clean-Up: Absorb with inert material, scoop up, and place in a cool, vented container for disposal
Ventilation: Ensure area remains well-ventilated to disperse vapors
Emergency Procedures: Isolate area, remove sources of ignition, review compatibility before using solvents for cleaning
Handling: Work in explosion-proof fume hood, ground containers; avoid shock, friction, heat, or open flames
Personal Hygiene: Wash thoroughly after use, keep skin covered
Storage Conditions: Store in a dry, cool (below 30°C), well-ventilated area away from sunlight, oxidizers, acids, and reducing agents
Container Advice: Use only containers designed for organic peroxides; keep tightly sealed
Segregation: Separate from combustibles and incompatible materials
Incompatible Substances: Acids, bases, heavy metal compounds, strong reducing agents
Recommended Engineering Controls: Mechanical exhaust, explosion-proof ventilation
Exposure Limits: None established for DNPDC, but using values for organic peroxides and solvents helps guide workplace safety
Respiratory Protection: NIOSH-approved organic vapor respirator if engineering controls fail
Hand Protection: Nitrile or butyl rubber gloves
Eye Protection: Chemical splash goggles, face shield as needed
Body Protection: Flame-resistant lab coat, chemical-resistant apron
Workplace Monitoring: Airborne concentrations of vapors or particles should be checked regularly in handling areas
Appearance: Colorless to pale yellow liquid
Odor: Mild, sweetish, not pungent
Melting Point: Below room temperature
Boiling Point: Decomposes before boiling
Decomposition Temperature: Can self-accelerate above 30°C, highly sensitive to heat
Solubility: Insoluble in water, soluble in common organic solvents (esters, ethers)
Vapor Pressure: Moderate
Density: Around 1.0 g/cm³ (varies with diluent)
Flash Point: Can be below ambient due to diluent
Explosive Properties: Strong; sensitive to impact, friction
Viscosity: Thin to moderately viscous
Chemical Stability: Unstable; rapid decomposition under heat, light or contamination
Conditions to Avoid: Temperatures above 30°C, exposure to sunlight, ignition sources, static discharge
Incompatible Materials: Metal oxides, acids, alkalis, reducing agents
Hazardous Reactions: May detonate under confinement or contamination
Decomposition Byproducts: Propanol, carbon dioxide, carbon monoxide, organic acids
Routes of Exposure: Skin, eye, inhalation, accidental ingestion
Acute Toxicity: Limited data; animal studies show moderate skin/eye irritation, low oral toxicity in diluted form
Symptoms: Irritation, redness, swelling, dizziness with high vapor exposure
Carcinogenicity: Not classified; very limited long-term exposure data
Chronic Effects: May defat skin with repeated contact; sensitization not expected
Target Organs: No identified target organs based on published data
Aquatic Toxicity: Harmful to fish or aquatic invertebrates if released in quantity
Persistence: Breaks down quickly in natural waters, but byproducts may have residual effects
Bioaccumulation: Unexpected for main ingredient, but some solvents or byproducts may accumulate in organisms
Mobility in Soil: Very mobile, but rapid breakdown tends to limit environmental spread
Disposal Approach: Only trained personnel should handle; unused material must be destroyed by licensed hazardous waste disposal
Incineration: Permitted in permitted facilities capable of handling peroxides
Preparation for Disposal: Avoid mixing with combustible waste; dilution sometimes recommended before transport, always check local regulations
Container Disposal: Decontaminate thoroughly with water and send for incineration or secure landfill
UN Number: Related to Organic Peroxides Type D, liquid
Proper Shipping Name: Organic Peroxide Type D, liquid (Di-n-Propyl Peroxydicarbonate mixture)
Packaging Group: Not traditionally assigned, shipped under strict temperature-controlled and ventilated packaging
Label: Organic Peroxide, flammable, oxidizing agent
Special Provisions: Keep from heat, secure upright, separate from foodstuffs and incompatible materials
Regulated Forms: Road, rail, sea, and air—a shipment always requires temperature logs and safety management
GHS Classification: Organic peroxide, flammable liquid, skin and eye irritant
Label Requirements: Pictograms for oxidizer, flame, exclamation mark
Worker Right-to-Know: All personnel must access safety training and know emergency procedures
Reporting Thresholds: Quantity-based reporting under federal chemical inventory laws
Disposal Laws: Strict federal, state, and local restrictions apply, impacting procurement, storage, and waste management
