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Chemical Name: o-Cresolphthalein Complexone
Synonyms: CPC, o-CPC
Common Uses: Blood calcium assays, laboratory reagent for colorimetric determination
Physical Appearance: Typically a dark red to purple powder, faint odor, stable in standard laboratory storage
Molecular Formula: C23H18O7S
Molecular Weight: 438.45 g/mol
CAS Number: 2411-89-4
Recommended Use: Diagnostic/analytical reagent, not for therapeutic or commercial food purposes
Main Hazards: Irritation to eyes, skin, and respiratory tract
GHS Classification: Irritant
Hazard Statements: Causes serious eye irritation, may cause skin irritation, may cause discomfort on inhalation
Signal Word: Warning
Pictograms: Exclamation mark for irritation
Precautionary Statements: Avoid breathing dust, wear protective gear, wash thoroughly after handling
Chemical Component: o-Cresolphthalein Complexone
Concentration: Over 98% purity in analytical grades
Impurities: May contain trace levels of stabilizers or byproducts, not considered hazardous
Inhalation: Move person to fresh air, seek medical attention if symptoms develop
Skin Contact: Remove contaminated clothing, wash exposed area with soap and water, seek care if irritation persists
Eye Contact: Rinse eyes gently with water for several minutes, remove lenses if present, contact physician if irritation continues
Ingestion: Rinse mouth thoroughly, do not induce vomiting, get medical assistance
Suitable Extinguishing Media: Water spray, dry chemical, foam, carbon dioxide
Special Hazards: Combustion produces oxides of carbon and sulfur, fumes may irritate respiratory tract
Protective Equipment: Firefighters should wear self-contained breathing apparatus
Specific Instructions: Cool containers exposed to flames with water spray, prevent runoff from reaching drains
Spill Response: Avoid raising dust, ventilate area
Cleanup Procedures: Sweep up and transfer to a dry, labeled container for disposal
Personal Protection: Laboratory gloves, goggles, lab coat, dust mask if large quantities
Environmental Precautions: Prevent from entering waterways or soil, inform local authorities if significant release occurs
Safe Handling Tips: Use in well-ventilated area, minimize dust generation, avoid contact with eyes and skin
Safe Storage: Store in tightly sealed containers in a cool, dry place, protect from moisture and incompatible substances
Incompatibility: Strong acids, oxidizers, unnecessary heat or sunlight
Exposure Limits: No regulated occupational exposure limits established
Engineering Controls: Laboratory fume hood, local exhaust
Personal Protective Equipment: Chemical splash goggles, nitrile gloves, long-sleeved lab coat
Hygiene Practices: Wash hands after handling, avoid consumption of food or drink in work area, do not touch face or eyes before cleaning up
Appearance: Red to purple solid
Odor: Faint, almost none
Melting Point: Decomposition above 350°C (662°F)
Solubility: Very slightly soluble in cold water, more soluble in alkaline solutions
pH Sensitivity: Shows distinct color change with pH, basis for analytical use
Vapor Pressure: Negligible at room temperature
Boiling Point: Not applicable, decomposes before boiling
Other Properties: Non-volatile, not hygroscopic under normal storage
Stability: Stable under standard conditions and recommended storage
Reactivity: May react with strong oxidizing agents, acids
Decomposition Products: Carbon dioxide, carbon monoxide, sulfur oxides under fire
Conditions to Avoid: Unsealed exposure to humidity, excessive heat, incompatible substances
Acute Toxicity: Low based on animal toxicity data for related compounds
Potential Health Effects: Eye and skin irritation, possible respiratory impact with dust exposure
Chronic Exposure: No long-term health hazard documented for trace lab-level exposure, no known carcinogenic or mutagenic effects in standard testing
Sensitization: No known sensitization associated
Environmental Impact: Persistent in environment unless treated, potential to impact aquatic life if released in large quantities
Degradability: Degrades slowly under environmental conditions, more stable in neutral/alkaline water
Bioaccumulation: Not significant based on chemical properties
Aquatic Toxicity: Limited data, avoid contamination of surface waters and soil
Disposal Methods: Collect in suitable sealed containers, dispose via licensed chemical waste handler
Waste Regulations: Follow local, regional, and national laws on hazardous laboratory waste
Contaminated Packaging: Containers should be disposed as hazardous chemical waste, avoid reuse
UN Number: Not classified as hazardous for transport under standard regulations
Transport Hazard Class: None assigned
Packing Group: None applicable
Shipping Precautions: Protect from physical damage, moisture entry during shipping, secure packaging to prevent accidental release
Labeling: Clearly identify as laboratory chemical, not for human or animal ingestion
OSHA: No specific listing as hazardous chemical, general laboratory safety applies
EU REACH: Substance falls within REACH guidelines for laboratory use, not restricted
Inventory Listings: Registered in standard chemical inventories in major jurisdictions
Workplace Regulation: Use under direct supervision of laboratory personnel trained in chemical safety, standard health and environmental precautions mandatory
Other Notes: Usage restricted to professional applications in research, diagnostics, and education
