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Toluene Diisocyanate

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Toluene Diisocyanate 19/9/2020 Report | CAMEO Chemicals | NOAA Print Chemical Datasheet TOLUENE DIISOCYANATE Chemical Identifiers CAS Number UN/NA Number DOT Hazard Label USCG CHRIS Code 26471-62-5 2078 Poison none NIOSH Pocket Guide International Chem Safety Card none none NFPA 704 Diamond Hazard Value Description 1 Health 3 Can cause serious or permanent injury. 3 2 Flammability 1 Must be preheated before ignition can occur. Readily undergoes violent chemical changes at elevated temperatures and Instability 2 pressures. Special Note: NFPA ratings shown are for 2,4-diisocyanatotoluene, CAS number 584-84-9. (NFPA, 2010) General Description A clear colorless to pale yellow liquid with a pungent odor. Denser than water. Burns, but may be difficult to ignite. Vapors are heavier than air. Vapors irritate the respiratory system. Toxic under prolonged exposure to vapor in low concentrations or short exposure to high concentrations of vapor. Carcinogenic. Produces toxic oxides of nitrogen during combustion. Used to make polyurethane foams and paints. Hazards Reactivity Alerts Water-Reactive Air & Water Reactions Reaction with water liberates carbon dioxide, reaction is slow at STP. Fire Hazard This chemical is combustible. (NTP, 1992) https://cameochemicals.noaa.gov/report?key=CH17847 1/5 19/9/2020 Report | CAMEO Chemicals | NOAA Health Hazard SYMPTOMS: Symptoms of exposure to this compound may include irritation of the skin, eyes and respiratory system. It may cause bronchial asthma. It may also cause bronchitis and pulmonary edema. Other symptoms may include nausea, vomiting and abdominal pain. Exposure may cause an asthmatic reaction with wheezing, dyspnea and cough. Some decrease in lung function in the absence of symptoms has been observed after long periods of exposure. Eosinophilia has been reported. It may cause sore throat, runny nose, diarrhea and bronchial spasm. High concentrations are destructive to tissues of the skin, eyes, mucous membranes, upper respiratory tract and digestive tract. Chemical or hypersensitive pneumonia may occur with flu-like symptoms (e.g. fever, chills). Irritation of the lungs may occur. Exposure may also cause laryngitis, shortness of breath and headache. Chest discomfort, including tightness and congestion, occurs. Insomnia has occurred. Death may result if inhaled, swallowed or absorbed through the skin. Skin contact may result in severe dermatitis. If the liquid is allowed to remain in contact with the skin, it may produce redness, swelling and blistering. It may also cause rashes and scaling. Skin sensitization can occur. Allergic eczema may also occur. Eye contact may cause severe irritation resulting in permanent damage if left untreated. It may cause keratitis and conjunctivitis. Eye contact may also cause lacrimation, smarting, burning and a prickling sensation. Ingestion may cause burns of the mouth and stomach. It may also have a corrosive effect on the stomach and esophagus. Gastrointestinal irritation may occur. Medical conditions aggravated by exposure to this compound include asthma, bronchitis, emphysema, bronchial hyperactivity, skin allergies and eczema. ACUTE/CHRONIC HAZARDS: This chemical is highly toxic by inhalation and ingestion. It is also highly toxic by skin contact. It is an irritant of the skin, eyes, mucous membranes and respiratory tract. It is also a lacrimator. When heated to decomposition it emits very toxic fumes of carbon monoxide, carbon dioxide, hydrogen cyanide and nitrogen oxides. (NTP, 1992) Reactivity Profile TOLUENE DIISOCYANATE is explosive in the form of vapor-air mixture when exposed to heat, flame or sparks. Potentially violent polymerization reaction with strong bases or acyl chlorides. Reaction with aniline may generate enough heat to ignite unreacted portion and surrounding materials. Reaction with water liberates carbon dioxide. Potential explosion if stored in polyethylene containers due to absorption of water through the plastic. Emits toxic fumes of oxides of nitrogen when heated to decomposition[Lewis, 3rd ed., 1993, p. 1251]. Belongs to the Following Reactive Group(s) Isocyanates and Isothiocyanates Potentially Incompatible Absorbents Use caution: Liquids with this reactive group classification have been known to react with the absorbents listed below. Cellulose-Based Absorbents Mineral-Based & Clay-Based Absorbents Dirt/Earth Response Recommendations Isolation and Evacuation Excerpt from ERG Guide 156 [Substances - Toxic and/or Corrosive (Combustible / Water-Sensitive)]: As an immediate precautionary measure, isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids. SPILL: Increase, in the downwind direction, as necessary, the isolation distance shown above. FIRE: If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2016) Firefighting Excerpt from ERG Guide 156 [Substances - Toxic and/or Corrosive (Combustible / Water-Sensitive)]: https://cameochemicals.noaa.gov/report?key=CH17847 2/5 19/9/2020 Report | CAMEO Chemicals | NOAA Note: Most foams will react with the material and release corrosive/toxic gases. SMALL FIRE: CO2, dry chemical, dry sand, alcohol-resistant foam. LARGE FIRE: Water spray, fog or alcohol-resistant foam. FOR CHLOROSILANES, DO NOT USE WATER; use AFFF alcohol-resistant medium-expansion foam. Move containers from fire area if you can do it without risk. Use water spray or fog; do not use straight streams. FIRE INVOLVING TANKS OR CAR/TRAILER LOADS: Fight fire from maximum distance or use unmanned hose holders or monitor nozzles. Do not get water inside containers. Cool containers with flooding quantities of water until well after fire is out. Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank. ALWAYS stay away from tanks engulfed in fire. (ERG, 2016) Non-Fire Response Excerpt from ERG Guide 156 [Substances - Toxic and/or Corrosive (Combustible / Water-Sensitive)]: ELIMINATE all ignition sources (no smoking, flares, sparks or flames in immediate area). All equipment used when handling the product must be grounded. Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. A vapor-suppressing foam may be used to reduce vapors. FOR CHLOROSILANES, use AFFF alcohol-resistant medium-expansion foam to reduce vapors. DO NOT GET WATER on spilled substance or inside containers. Use water spray to reduce vapors or divert vapor cloud drift. Avoid allowing water runoff to contact spilled material. Prevent entry into waterways, sewers, basements or confined areas. SMALL SPILL: Cover with DRY earth, DRY sand or other non-combustible material followed with plastic sheet to minimize spreading or contact with rain. Use clean, non-sparking tools to collect material and place it into loosely covered plastic containers for later disposal. (ERG, 2016) Protective Clothing Excerpt from GUIDE 156 [Substances - Toxic and/or Corrosive (Combustible / Water-Sensitive)]: Wear positive pressure self-contained breathing apparatus (SCBA). Wear chemical protective clothing that is specifically recommended by the manufacturer. It may provide little or no thermal protection. Structural firefighters' protective clothing provides limited protection in fire situations ONLY; it is not effective in spill situations where direct contact with the substance is possible. (ERG, 2016) DuPont Tychem® Suit Fabrics Normalized Breakthrough Times (in Minutes) Chemical CAS Number State QS QC SL C3 TF TP BR RC TK RF Toluene-1,3-diisocyanate (>95%) 26471-62-5 Liquid >480 >480 >480 >480 > indicates greater than. A blank cell indicates the fabric has not been tested. The fabric may or may not offer barrier. Special Warnings from DuPont 1. Serged and bound seams are degraded by some hazardous liquid chemicals, such as strong acids, and should not be worn when these chemicals are present. 2. CAUTION: This information is based upon technical data that DuPont believes to be reliable. It is subject to revision as additional knowledge and experience are gained. DuPont makes no guarantee of results and assumes no obligation or liability... (DuPont, 2018) First Aid EYES: First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop. https://cameochemicals.noaa.gov/report?key=CH17847 3/5 19/9/2020 Report | CAMEO Chemicals | NOAA SKIN: IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. IMMEDIATELY call a hospital or poison control center even if no symptoms (such as redness or irritation) develop. IMMEDIATELY transport the victim to a hospital for treatment after washing the affected areas. INHALATION: IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. IMMEDIATELY call a physician and be prepared to transport the victim to a hospital even if no symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop.
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