Product Name: Phenylphosphonic Acid
Chemical Name: Phenylphosphonic Acid
Synonyms: PPA, Benzenephosphonic acid
CAS Number: 1571-33-1
EC Number: 216-406-3
Recommended Use: Used in chemical synthesis, laboratory research, and water treatment applications.
Manufacturer Information: Detailed name, address, and emergency contact provided on the label.
Emergency Contact: Chemtrec or local poison control center.
Classification: Corrosive to metals, Serious eye damage, Skin irritation
Label Elements: Danger symbol (corrosive), Hazard statement for skin corrosion, eye damage, respiratory irritation
Hazard Statements: Causes severe skin burns and eye damage. Harmful if inhaled. May cause respiratory irritation.
Precautionary Statements: Avoid breathing dust, fumes, mist, and vapors. Wear protective gloves, clothing, and face protection. Wash thoroughly after handling. Store locked up and in well-ventilated areas. Dispose of contents in accordance with local regulations.
Other Hazards: Slightly water reactive; may generate heat and phosphine gas with incompatible reactions.
Component: Phenylphosphonic Acid
Chemical Formula: C6H7O3P
Concentration: 98 – 100% pure
Impurities/Stabilisers: Often none noted in technical grade material.
CAS Number: 1571-33-1
Other Details: No substances present above relevant cut-off levels that need to be included according to current regulations.
Inhalation: Move person to fresh air. If breathing becomes difficult, seek immediate medical attention. Provide oxygen if available.
Skin Contact: Remove contaminated clothing and wash affected area with plenty of water for at least 15 minutes. Seek medical help for persistent irritation.
Eye Contact: Rinse cautiously with water for several minutes, holding eyelids open. Remove contact lenses if present and easy to do. Continue rinsing, and call a doctor urgently.
Ingestion: Rinse mouth with water. Do not induce vomiting. Seek immediate medical attention. Never give anything by mouth to an unconscious person.
Most Important Effects/Symptoms: Corrosive injury to skin, eyes, gastrointestinal tract or respiratory system. Pain, redness, watering, ulcers or permanent blindness may occur for eyes. Burns and blisters may develop on skin. Inhalation may cause respiratory distress.
Suitable Extinguishing Media: Use alcohol-resistant foam, dry chemical powder, or carbon dioxide. Water mist recommended for small fires only.
Unsuitable Extinguishing Media: Direct water spray on large quantities may cause violent splattering or spread contamination.
Hazardous Combustion Products: Releases toxic phosphorus oxides and phenol vapors during combustion.
Special Protective Equipment/Precautions: Firefighters must wear self-contained breathing apparatus and fully protective gear. Avoid breathing vapors. Remove non-involved personnel from area.
Specific Methods: Cool containers exposed to heat with water spray. Prevent firefighting water from entering surface waterways or sewers.
Personal Precautions: Remove sources of ignition. Evacuate unnecessary personnel from the area. Wear appropriate protective equipment including gloves, goggles, and chemical-resistant clothing.
Environmental Precautions: Prevent entry into drains, sewers, or watercourses.
Spill Cleanup Methods: Absorb with inert material such as sand or earth and transfer to a suitable container for disposal. All contaminated materials should be handled as hazardous waste.
Emergency Procedures: Use positive pressure, self-contained breathing apparatus for large scale spill. Wash down affected area with plenty of water after pick-up is complete.
Handling: Avoid contact with skin, eyes, and clothing. Use only in well-ventilated areas. Do not breathe dust, vapor, or mist. Open containers carefully, as pressure may build up over time.
Storage: Store in tightly closed containers away from incompatible substances such as strong bases, oxidizers, and metals. Keep in a cool, dry, and well-ventilated location. Protect from moisture and direct sunlight. Label all containers clearly. Access limited to trained personnel.
Occupational Exposure Limits: No specific limit set for phenylphosphonic acid. Keep exposure as low as possible.
Engineering Controls: Use local exhaust ventilation or work inside chemical fume hoods.
Personal Protective Equipment: Safety goggles for eye protection, chemical resistant gloves (nitrile or butyl rubber), full body chemical apron or suit. Use positive pressure respirators for major spills or heavy exposure.
Hygiene Measures: Wash hands and any exposed skin thoroughly after handling. Do not eat, drink, or smoke during use. Remove contaminated clothing and wash before reuse.
Environmental Controls: Prevent emissions to the air, soil, and water through suitable containment.
Appearance: White to off-white crystalline solid or powder
Odor: Odorless or faint phenolic
pH: Strongly acidic in water (approx. 1-3, 1% solution)
Melting Point: 198–205 °C
Boiling Point: Decomposes before boiling
Flash Point: Not applicable (decomposes)
Solubility: Soluble in water, alcohols, and some organic solvents
Vapor Pressure: Negligible at room temperature
Density: 1.41 g/cm³
Partition Coefficient: Not readily available
Auto-Ignition Temperature: Data not available
Explosive Properties: Not classified as explosive.
Chemical Stability: Stable under recommended storage and handling conditions.
Reactivity: Reacts exothermically with strong bases and oxidizers. Possible reaction with water to release heat.
Conditions to Avoid: Excess moisture, strong heat, contact with incompatible materials.
Incompatible Materials: Bases, oxidizing agents, metals such as aluminum and magnesium.
Hazardous Decomposition Products: Phosphorus oxides, carbon oxides, phenol vapors.
Polymerization: Does not occur.
Route of Entry: Inhalation, ingestion, dermal, eye contact
Acute Toxicity: Can cause severe burns to skin and eyes. May irritate respiratory system and mucous membranes. LD50 oral (rat): reported between 600 – 1000 mg/kg.
Chronic Toxicity: Chronic exposure may cause dermatitis or respiratory tract damage.
Symptoms of Exposure: Pain, redness, tissue destruction on skin or eyes; coughing, sore throat, shortness of breath if inhaled.
Carcinogenicity: Not classified as carcinogen. No noted evidence from current literature.
Reproductive or Developmental Effects: Data unavailable.
Other Data: No known sensitizing or long-term mutagenic effects.
Ecotoxicity: Toxic to aquatic organisms at high concentrations. Acute/chronic aquatic toxicity data limited.
Persistence and Degradability: Expected to partially degrade under environmental conditions. Hydrolyzes slowly in natural waters.
Bioaccumulative Potential: Estimated as low due to ionization in water.
Mobility in Soil: Moderately mobile due to partial water solubility. May pose risk to groundwater if improperly managed.
Other Effects: Avoid uncontrolled release to environment. No major risk of bioaccumulation in food chain reported.
Disposal Methods: Dispose through licensed chemical waste handler. Do not discharge to surface water or soil. Consult state and local environmental laws before disposal.
Contaminated Packaging: Rinse empty containers before discarding according to official regulations.
Special Precautions: Treat all residues as hazardous. Incineration is often preferred, following official safety regulations.
UN Number: 3261 (for corrosive solid, acidic, organic, n.o.s., containing phenylphosphonic acid)
UN Proper Shipping Name: Corrosive solid, acidic, organic, n.o.s.
Transport Hazard Class: 8 (Corrosive substances)
Packing Group: II
Transport Labels: Corrosive
Marine Pollutant: Not classified as marine pollutant
Special precautions: Transport by trained personnel only. Secure containers to prevent movement or damage. Do not mix or store with incompatible materials during transport.
OSHA: Not specifically regulated, but general standard for hazardous chemicals applies.
TSCA: Listed on the U.S. Toxic Substances Control Act inventory.
DSL/NDSL (Canada): Included
REACH (Europe): Registration required above 1 tonne/year. Not a substance of very high concern.
SARA Title III: No sections triggered.
California Proposition 65: Not listed
Other Regulatory Status: Not classified as a controlled drug or precursor under international regulations. Check local or regional regulations for workplace, transport, and disposal.
