MSDS Overview: 1-Methyl-3-(Trifluoromethyl)-1H-Pyrazole-4-Carboxylic Acid

Identification

Chemical Name: 1-Methyl-3-(Trifluoromethyl)-1H-Pyrazole-4-Carboxylic Acid
Chemical Formula: C6H5F3N2O2
Appearance: White to off-white crystalline powder
Odor: Odorless or faint chemical scent
Common Uses: Intermediate in organic synthesis, laboratory reagent, potential pharmaceutical precursor

Hazard Identification

Hazard Class: Skin and eye irritant
Health Risks: Dust can affect respiratory system if inhaled, may cause coughing and minor breathing difficulty
Chronic Exposure Effects: Extended contact could increase risk of dermatitis; no evidence points to carcinogenicity
Flammability: Not expected to be highly flammable, yet dust can combust under direct ignition
Signal Words: Warning signs: “Irritant”

Composition / Information on Ingredients

Main Ingredient: 1-Methyl-3-(Trifluoromethyl)-1H-Pyrazole-4-Carboxylic Acid (over 98%)
Chemical Impurities: Trace synthetic byproducts arising from manufacturing process
Physical State: Solid

First Aid Measures

Eye Contact: Rinse gently with water for several minutes, remove contact lenses, continue rinsing
Skin Contact: Remove contaminated clothing, wash affected area with soap and water
Inhalation: Move into fresh air, seek medical help if breathing feels restricted
Ingestion: Rinse mouth, seek professional help if any symptoms arise, avoid inducing vomiting

Fire-Fighting Measures

Suitable Extinguishing Media: Use dry chemical, foam, or CO2 extinguishers for small fires
Special Hazards: May emit toxic fumes, such as nitrogen oxides and hydrogen fluoride, under strong combustion
Protective Equipment: Fire fighters need full protective gear and self-contained breathing apparatus
Explosion Risk: Fine dust could form explosive mixtures in air, though risk is usually low in solid form

Accidental Release Measures

Spill Cleanup: Sweep gently, avoid dust release, collect spilled chemical in a properly labeled container
Personal Precautions: Wear gloves, safety goggles, and a fitted mask
Environmental Precautions: Prevent chemical from entering drains or waterways, sweep up dry rather than washing away

Handling and Storage

Handling: Work in a well-ventilated spot, use local exhaust when making or testing mixtures
Hygiene Practices: Wash hands thoroughly after contact, avoid eating or drinking in work areas
Storage Conditions: Store tightly sealed in a cool, dry location, avoid sources of ignition, keep separate from incompatible materials such as strong bases and oxidizers

Exposure Controls and Personal Protection

Engineering Controls: Local ventilation helps limit dust and vapor buildup in the air
Personal Protection: Gloves made of nitrile or neoprene, safety glasses, and dust masks give good protection
Occupational Limits: No specific legal exposure limits reported, so following general lab chemical exposure limits (such as OSHA PELs for particulates) makes sense

Physical and Chemical Properties

Physical State: Fine powder or small crystals
Color: White to pale cream
Melting Point: Usually melts above 150°C
Boiling Point: Breaks down before reaching boiling; not volatile at standard pressure
Solubility: Limited water solubility, dissolves in polar organic solvents
Odor: Faint, chemical-like
pH (aqueous): Slightly acidic
Vapor Pressure: Negligible at room temperature

Stability and Reactivity

Stability: Stable at room temperature under recommended storage
Incompatible Materials: Strong bases, strong oxidizing agents
Hazardous Reactions: No dangerous polymerization or strong reactivity seen under normal use
Decomposition Products: Heating can release toxic vapors including HF, NOx, sometimes CO and CO2

Toxicological Information

Routes of Exposure: Inhalation, skin, and accidental ingestion
Acute Symptoms: Skin and eye irritation, reversible respiratory discomfort like coughing and sneezing
Chronic Effects: Skin dryness or cracking from repeat exposure
Allergenicity: No strong evidence showing allergic response
Carcinogenicity: Not listed as carcinogen by IARC, NTP, or OSHA

Ecological Information

Aquatic Toxicity: Not much data; by analogy to similar chemicals, not considered highly toxic, but persistence in environment possible due to fluorine atoms
Persistence and Degradability: Stable in soil and water; may not break down quickly
Bioaccumulation: Not expected to build up in animal tissue, but monitoring recommended for unintended releases

Disposal Considerations

Product Disposal: Treat as hazardous; incinerate at a licensed facility if local rules allow, or contact professional waste handler
Container Disposal: Empty containers should be decontaminated and handled as chemical waste, not standard trash
Avoid: Pouring down drain or into soil to reduce long-term trace pollution

Transport Information

UN/NA Number: Not officially assigned
Transport Risks: Handle as an irritant, avoid puncturing or breaking packaging
Regulatory Description: Not classed as dangerous for road, rail, or air transport based on current hazard data, as long as basic safe packaging is used
Packing: Use tightly sealed barrels or bottles, padded to prevent breakage

Regulatory Information

Inventory Status: This chemical may appear in inventories such as TSCA, REACH, or similar, provided for research and manufacturing uses
Labeling Requirements: Signal word "Warning", hazard pictogram for irritation, and precautionary statements about avoiding breathing dust or getting in eyes
Restrictions: No special bans under common US or EU regulatory lists as of the latest review, though workplace use governed by general chemical safety laws