perchloric acid

CAS No.: 7601-90-3
Formula: ClHO4
Exact Mass: 99.95630
Molecular Weight: 100.45900
PSA: 71.44000
LogP: 0.15630
perchloric acid 7601-90-3 MSDS

Section 1. Chemical Product and Company Identification
    Perchloric acid, 70%
    Common Name/
    Trade Name
    Commercial Name(s)
    Chemical Name
    Chemical Family
    Perchloric acid, 70%
    Potential Chronic Health        Hazardous in case of skin contact (sensitizer).    
    Non-corrosive for skin. Non-irritant for skin. Non-permeator by skin. Non-irritating to the eyes.
    Non-hazardous in case of ingestion. Non-hazardous in case of inhalation. Non-irritant for lungs.
    Non-sensitizer for lungs.
    CARCINOGENIC EFFECTS: Not available.
    MUTAGENIC EFFECTS: Not available.
    TERATOGENIC EFFECTS: Not available.
    The substance is toxic to lungs.
    Repeated or prolonged exposure to the substance can produce target organs damage. Repeated or
    prolonged contact with spray mist may produce chronic eye irritation and severe skin irritation. Repeated or
    prolonged exposure to spray mist may produce respiratory tract irritation leading to frequent attacks of
    bronchial infection.

Section 4. First Aid Measures
    Eye Contact        Check for and remove any contact lenses. In case of contact, immediately flush eyes with plenty of water for    
    at least 15 minutes. Cold water may be used. Get medical attention immediately.
    Skin Contact        In case of contact, immediately flush skin with plenty of water for at least 15 minutes while removing    
    contaminated clothing and shoes. Cover the irritated skin with an emollient. Cold water may be used.Wash
    clothing before reuse. Thoroughly clean shoes before reuse. Get medical attention immediately.
    Serious Skin Contact        Wash with a disinfectant soap and cover the contaminated skin with an anti-bacterial cream. Seek immediate    
    medical attention.
    Inhalation        If inhaled, remove to fresh air. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.    
    Get medical attention immediately.
    Serious Inhalation        Evacuate the victim to a safe area as soon as possible. Loosen tight clothing such as a collar, tie, belt or    
    waistband. If breathing is difficult, administer oxygen. If the victim is not breathing, perform mouth-to-mouth
    resuscitation. Seek medical attention.
    Ingestion        Do NOT induce vomiting unless directed to do so by medical personnel. Never give anything by mouth to an    
    unconscious person. If large quantities of this material are swallowed, call a physician immediately. Loosen
    tight clothing such as a collar, tie, belt or waistband.
    Serious Ingestion        Not available.    

Section 5. Fire and Explosion Data
    Flammability of the Product Non-flammable.
    Auto-Ignition Temperature Not applicable.
    Not applicable.
    Flash Points
    Flammable Limits        Not applicable.    
    Products of Combustion        Not available.    
    Fire Hazards in Presence of of organic materials of combustible materials
    Various Substances
    Explosion Hazards in Presence Explosive in presence of open flames and sparks, of heat, of combustible materials, of organic materials, of
    acids, of alkalis.
    of Various Substances
    Non-explosive in presence of shocks.
    Not applicable.
    Fire Fighting Media
    and Instructions
    Special Remarks on        May ignite other combustible materials.    
    May deflagrate in contact with other oxidizable substances.
    Fire Hazards
    Will increase the intensity of a fire.
    May cause fire on contact with combustibles.
    Anydrous acid ingnites on contact with sodium iodide or hydriodic acid.
    Mixtures of 2-methylpropene and perchloric acid vapor (5:1 molar) in nitrogen ignite spontaneously at 250 C.
    Anydrous acid ignites sulfinyl chloride.
    Perchloric acid, 70%
    Special Remarks on Explosion Decomposes when distilled at atmospheric pressure, sometimes with explosive violence.
    Undergoes spontaneous and explosive decomposition.
    Perchloric acid + acetic acid can cause explosion.
    Hot concentrated perchloric acid acid + alcohols or cellulose is particularly dangerous.
    Perchloric acid + aniline and then formaldehyde gives resinous condensation product which burns with
    explosive violence.
    Drop of anhydrous perchloric acid +diethyl ether causes explosion.
    Drop of anhydrous perchloric acid on charcoal causes explosion.
    70% Perchloric acid solution reacts instantly and explosively on contact with Dibutyl Sulfoxide.
    Perchloric acid + ethyl alcohol or methyl alcohol can cause explosion.
    Perchloric acid + most organic materials can cause explosion.
    Drop of anhydrous perchloric acid on paper can cause violent explosion.
    Explosion occurs when 70% perchloric acid contacts sulfoxides.
    Some inorganic materials, such as hypophosphites, tend to form explosive mixtures with perchloric acid when
    Reaction of anhydrous perchloric acid and wood fibers or dust causes violent explosion.
    Contact of fluorine and 72% perchloric acid at ambient temperature produces a high yield of explosive gas,
    fluorine perchlorate.
    Perchloric acid + nitrogenous epoxides causes precipitaition of organic perchlorate which is highly explosive.
    Containers may explode in fire.

Section 6. Accidental Release Measures
    Small Spill        Dilute with water and mop up, or absorb with an inert dry material and place in an appropriate waste disposal    
    Large Spill
    Corrosive liquid. Oxidizing material.
    Stop leak if without risk. Absorb with DRY earth, sand or other non-combustible material. Do not get water
    inside container. Avoid contact with a combustible material (wood, paper, oil, clothing...). Keep substance
    damp using water spray. Do not touch spilled material. Use water spray curtain to divert vapor drift. Prevent

Section 7. Handling and Storage
    Precautions        Keep container dry. Keep away from heat. Keep away from sources of ignition. Keep away from    
    combustible material.. Do not ingest. Do not breathe gas/fumes/ vapor/spray. Never add water to this
    product. Take precautionary measures against electrostatic discharges. In case of insufficient ventilation,
    wear suitable respiratory equipment. If ingested, seek medical advice immediately and show the container or
    the label. Avoid contact with skin and eyes. Keep away from incompatibles such as reducing agents,
    combustible materials, organic materials, metals, acids, alkalis, moisture.
    Storage        Keep container tightly closed. Keep container in a cool, well-ventilated area. Separate from acids, alkalies,    
    reducing agents and combustibles. See NFPA 43A, Code for the Storage of Liquid and Solid Oxidizers.

Section 8. Exposure Controls/Personal Protection
    Engineering Controls        Provide exhaust ventilation or other engineering controls to keep the airborne concentrations of vapors below    
    their respective threshold limit value.
    Personal Protection        Face shield. Full suit. Vapor respirator. Be sure to use an approved/certified respirator or equivalent.    
    Gloves. Boots.
    Personal Protection in Case of Splash goggles. Full suit. Vapor respirator. Boots. Gloves. A self contained breathing apparatus should be
    a Large Spill        used to avoid inhalation of the product. Suggested protective clothing might not be sufficient; consult a    
    specialist BEFORE handling this product.
    Exposure Limits        Not available.    

Section 9. Physical and Chemical Properties
    Physical state and appearance Liquid. (Oily liquid.)        Odorless.    
    Taste        Not available.    
    Molecular Weight        100.46    
    Color        Colorless. Clear    
    pH (1% soln/water)        Not available    
    Boiling Point        203°C (397.4°F)    
    Melting Point        -19°C (-2.2°F)    
    Critical Temperature        Not available.    
    Perchloric acid, 70%
    Specific Gravity        1.67 (Water = 1)    
    Vapor Pressure        0.9 kPa (@ 20°C)    
    3.46 (Air = 1)
    Vapor Density
    Volatility        Not available.    
    Odor Threshold        Not available.    
    Water/Oil Dist. Coeff.        Not available.    
    Ionicity (in Water)        Not available.    
    See solubility in water.
    Dispersion Properties
    Solubility        Easily soluble in cold water.    

Section 10. Stability and Reactivity Data
    Stability        stable.    
    Instability Temperature        Not available.    
    Conditions of Instability        Perchloric acid itself is unstable (volatile) in concentrated form. It may undergo spontaneous and explosive    
    It is also unstable if heated and in contact with incompatible materials, and moisture.
    Incompatibility with various Highly reactive with combustible materials, organic materials, acids, alkalis.
    Reactive with reducing agents, metals, water.
    Corrosivity        Extremely corrosive in presence of aluminum, of copper.    
    Highly corrosive in presence of stainless steel(304), of stainless steel(316).
    Non-corrosive in presence of glass.
    Incompatible with acids, acetic anhydride, alcohols, aniline and formaldehyde, alkaline materials, organic
    Special Remarks on
    Reactivity        materials, combustible materials (cellulose, paper, wood), Antimony III compounds, bismuth, charcoal, dibutyl    
    sulfoxide, diethyl ether, dimethyl sulfoxide, fluorine, glycerine and lead oxide, glycol ethers, hydriodic acid,
    hydrogen, hypophosphites, ketones, methyl alcohol, nitrogen iodide, nitrosophenol, phosphorous pentoxide,
    phosphorus pentoxide and chloroform, sodium iodide, steel, sulfoxides, sulfur trioxide. May react violently or
    explosively with many of these compounds.
    Reaction with fuels may be violent.
    Mixtures of acetic acid, perchloric, and acetic anhydride have varying degrees of sensitivity to shock.
    Addition of acetic anhydride to aqueous solution of perchloric acid causes formation of acetic acid which can
    react violently with perchloric acid.
    Perchloric acid is very hydroscopic and combines vigorously with water with evolution of heat.
    Special Remarks on        The aqueous is very caustic.    
    Minor corrosive effect on bronze.
    Polymerization        Will not occur.    

Section 11. Toxicological Information
    Routes of Entry        Absorbed through skin. Dermal contact. Eye contact. Inhalation. Ingestion.    
    Toxicity to Animals        Acute oral toxicity (LD50): 1100 mg/kg [Rat].    
    Chronic Effects on Humans Causes damage to the following organs: lungs.
    Other Toxic Effects on        Extremely hazardous in case of inhalation (lung corrosive).    
    Humans        Very hazardous in case of skin contact (corrosive, irritant), of eye contact (corrosive), of ingestion, .    
    Special Remarks on        Not available.    
    Toxicity to Animals
    Special Remarks on        Not available.    
    Chronic Effects on Humans
    Special Remarks on other
    Toxic Effects on Humans
    Perchloric acid, 70%
    Acute Potential Health Effects:
    Skin: Causes skin burns. May cause deep penetrating ulcers of the skin.
    Eyes: Causes eye burns. May cause retinal damage.
    Inhalation: May cause severe irritation of the respiratory tract with sore throat, coughing, shortness of breath
    and delayed lung edema. Inhalation may fatal as a result of spasm, inflammation, edema of the larynx and
    bronchi, chemical pneumonitis, and pulmonary edema.
    Ingestion: Harmful if swallowed. Causes intestinal tract burns (corrosion or burns of the mouth, throat,
    esophagus). Symptoms may include pain, dysphagia, necrotic areas, epigastric pain, which may be
    associated with nausea, and vomiting, corrosive ulceration, gastric bleeding, profound thirst, scanty urine,
    shock and circulatory collapse. May also affect behavior, respiration(dyspnea), and metabolism, liver,
    kidneys, and cardiovascular system.
    Chronic Potential Health Effects:
    Skin: Repeated or prolonged skin contact may cause skin sensitization, an allergic reaction and possible
    destruction and/or ulceration.
    Inhalation: Prolonged or repeated inhalation may cause nosebleeds, nasal congestion, erosion of the teeth,
    perforation of the nasal septum, chest pain and bronchitis.
    Eyes: Prolonged or repeated eye contact may cause conjunctivitis.
    Ingestion: Chronic ingestion may cause effects similar to those of acute ingestion.

Section 12. Ecological Information
    Ecotoxicity        Not available.    
    BOD5 and COD        Not available.    
    Products of Biodegradation Possibly hazardous short/long term degradation products are to be expected.
    Toxicity of the Products        Not available.    
    of Biodegradation
    Special Remarks on the        Not available.    
    Products of Biodegradation

Section 13. Disposal Considerations
    Waste must be disposed of in accordance with federal, state and local environmental
    Waste Disposal
    control regulations.

Section 14. Transport Information
    DOT Classification        CLASS 5.1: Oxidizing material.    
    Class 8: Corrosive material
    Identification        UNNA: 1873 : Perchloric acid PG: I    
    Special Provisions for        Not available.    
    DOT (Pictograms)

Section 15. Other Regulatory Information and Pictograms
    Federal and State        For CAS no. 7601-90-3:    
    Pennsylvania RTK: Perchloric acid
    Massachusetts RTK: Perchloric acid
    New Jersey: Perchloric acid
    TSCA 8(b) inventory: Perchloric acid
    California        California prop. 65: This product contains the following ingredients for which the State of California has    
    found to cause cancer which would require a warning under the statute: No products were found.
    Proposition 65
    California prop. 65: This product contains the following ingredients for which the State of California has
    found to cause birth defects which would require a warning under the statute: No products were found.
    Other Regulations
    Perchloric acid, 70%
    OSHA: Hazardous by definition of Hazard Communication Standard (29 CFR 1910.1200).
    For CAS no. 7601-90-3:
    EINECS: This product is on the European Inventory of Existing Commercial Chemical Substances (EINECS
    No. 231-512-4).
    Canada: Listed on Canadian Domestic Substance List (DSL).
    China: Listed on National Inventory.
    Japan: Listed on National Inventory (ENCS).
    Korea: Listed on National Inventory (KECI).
    Philippines: Listed on National Inventory (PICCS).
    Australia: Listed on AICS.
    CLASS C: Oxidizing material.
    Other Classifications        WHMIS (Canada)    
    CLASS E: Corrosive liquid.
    DSCL (EEC)        R5- Heating may cause an explosion.        S23- Do not breathe gas/fumes/vapour/spray    
    R8- Contact with combustible        [***]    
    material may cause fire.        S26- In case of contact with eyes, rinse    
    R35- Causes severe burns.        immediately with plenty of water and seek    
    medical advice.
    S36- Wear suitable protective clothing.
    S45- In case of accident or if you feel unwell,
    seek medical advice immediately (show the
    label where possible).
    Health Hazard
    HMIS (U.S.A.)        3 National Fire Protection    
    0 Flammability
    0 Association (U.S.A.)
    Fire Hazard
    3 3 Reactivity
    Specific hazard
    Personal Protection
    WHMIS (Canada)
    DSCL (Europe)
    TDG (Canada)
    ADR (Europe)
    Protective Equipment
    Full suit.
    Vapor respirator. Be sure to use an
    approved/certified respirator or
    equivalent. Wear appropriate
    respirator when ventilation is
    Perchloric acid, 70%


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