Chemical Name: Phenazine Methosulfate
Synonyms: PMS, 1-Methoxy-5-methylphenazinium methylsulfate
CAS Number: 299-11-6
Product Use: Laboratory reagent, diagnostic testing, electron carrier in biochemical assays
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Classification: Acute toxicity (Oral), Skin sensitizer, Eye irritant
Signal Word: Warning
Hazard Statement: May be harmful if swallowed; may cause skin irritation; can provoke serious eye irritation; potential respiratory irritant
Pictogram: Exclamation mark symbol
Precautionary Statements: Avoid inhalation and contact with eyes or skin, do not eat, drink, or smoke near the substance, wash thoroughly after handling
Chemical Formula: C13H12N2O·CH3OSO3
Ingredients: Phenazine Methosulfate – 98-100%, residual impurities below 2%, non-hazardous stabilizers (trace)
Molecular Weight: 306.36 g/mol
Inhalation: Move to fresh air, get medical attention if signs of breathing trouble appear, supply oxygen if needed
Skin Contact: Take off contaminated clothing, wash skin with soap and plenty of water, consult a physician if irritation persists
Eye Contact: Rinse thoroughly with water for at least 15 minutes, keep eyes wide open, seek medical advice
Ingestion: Rinse mouth; do not induce vomiting unless instructed by medical personnel, contact a poison center or doctor immediately
Suitable Extinguishing Media: Use dry chemical, CO2, water spray, or alcohol-resistant foam
Unsuitable Media: Avoid strong streams of water
Specific Hazards: Releases toxic fumes of nitrogen oxides, carbon oxides, and sulfur oxides upon combustion
Protective Equipment: Firefighters wear self-contained breathing apparatus and full protective gear, evacuate area if heavy smoke
Firefighting Instructions: Cool unopened containers near fire with water spray to prevent rupture
Personal Precautions: Use personal protective equipment, keep unprotected persons away, ventilate area
Spill Response: Avoid dust formation, sweep up material carefully, place in a tightly sealed container
Environmental Precautions: Prevent spillage from entering drains, surface water, or soil
Cleanup Method: Wash spill area with plenty of water after collecting solid; dispose in line with local regulations
Handling: Wear gloves, lab coat, and eye protection, avoid breathing dust, keep away from food and drinks, use only in well-ventilated areas, minimize dust generation
Storage Conditions: Store in a tightly closed container, place in a cool, dry place away from oxidizing agents and heat sources, keep out of reach of children
Incompatible Materials: Strong oxidizers, acids, bases
Special Precautions: Keep storage area removed from common workspaces; don’t store with food, feed, or potable water
Engineering Controls: Use chemical fume hood or exhaust to reduce exposure, maintain adequate general ventilation
Eye Protection: Chemical safety goggles, face shield
Skin Protection: Nitrile or neoprene gloves, long-sleeved clothing
Respiratory Protection: Dust mask or respirator (NIOSH-approved) for high-dust situations
Hygiene Measures: Wash hands before breaks and after handling, avoid contact with skin and eyes, remove contaminated clothing immediately
Appearance: Yellow to orange crystalline powder
Odor: Odorless or faint chemical smell
Solubility: Soluble in water and alcohol, limited solubility in most organic solvents
pH: Typically slightly acidic to neutral
Melting Point: 175-180°C
Boiling Point: Not applicable
Vapor Pressure: Negligible
Flash Point: Not determined
Density: Approx. 1.3 g/cm3
Explosive Properties: No known explosive properties in standard handling
Chemical Stability: Stable under recommended storage and handling practices
Reactivity: May react exothermically with strong oxidizers
Hazardous Decomposition Products: May release nitrogen oxides, carbon monoxide, carbon dioxide, sulfur oxides
Conditions to Avoid: Excessive heat, exposure to light, strong acids or bases, oxidizing agents
Polymerization: Does not occur under normal conditions
Acute Toxicity: Low to moderate toxicity by oral or dermal exposure, LD50 (oral, rat): around 560 mg/kg
Chronic Effects: Prolonged contact may cause skin or eye irritation; repeated exposure could result in sensitization reactions
Carcinogenicity: No long-term carcinogenic studies found
Reproductive Toxicity: No published evidence of reproductive harm
Inhalation: Irritation to mucous membranes possible, coughing or difficulty breathing in dust clouds
Skin/Eye Irritation: Can provoke irritation or redness, rinsing required if contact occurs
Ecotoxicity: May prove toxic to aquatic organisms with long-term effects, avoid bulk release to water bodies
Persistence and Degradability: Moderately persistent, not readily biodegradable
Mobility: Highly mobile in water
Bioaccumulation Potential: Low expected, but avoid regular release to environment
Other Adverse Effects: May adversely impact microorganisms in soil or water at high concentrations
Waste Treatment Methods: Follow local hazardous waste disposal regulations, do not dispose of down the drain
Container Disposal: Triple rinse containers and render unusable prior to disposal
Recommended Disposal: Incinerate under controlled conditions with proper emissions management, contact approved facility for large quantities
Unclean Packaging: Handle like product waste; minimize environmental release
UN Number: Not regulated under most global hazardous materials codes
Transport Hazard Class: Not classified as dangerous for transport
Packing Group: Not applicable
Transport Label: Avoid rough handling, minimize exposure to heat or moisture
Special Precautions: Keep containers tightly sealed, store separately from food and feedstuffs, check local guidelines
TSCA: Listed on the US Toxic Substances Control Act Inventory
REACH: Registered substance in EU, check latest regulatory status
OSHA: Not considered hazardous under OSHA Hazard Communication Standard
WHMIS (Canada): Not controlled under Canadian WHMIS
Other Regulations: Follow local, national, and international chemical regulations, review site-specific risk assessments for laboratory use
