- Dihydrogen methylphosphonate
- Methanephosphonic acid
White, crystalline flakes.
Registry Numbers and Inventories.
S 26 36/37/39 45
Japan ENCS (MITI)
Melting point, °C
1.639 g/cm3 (20 C)
Solubility in water
> 20 g/L
Partition coefficient, pKow
Hazards and Protection.
Keep in a cool, dry location in a tightly closed container.
Avoid prolonged or repeated exposure. Dont breathe dust. Prevent exposure by using protective equipment.
Chemical splash goggles in compliance with OSHA regulations are advised; however, OSHA regulations also permit other type safety glasses. Whre chemical resistant gloves. To prevent repeated or prolonged skin contact, wear impervious clothing and boots.
Respiratory protection (supplied-air respirator with full facepiece or self-contained breathing apparatus) should be available where these compounds are manufactured or used and should be worn in case of emergency and overexposure.
Evacuate the area. Wear SCBA, rubber boots and gloves. Cover with dry lime or soda ash. Pickup and keep in a closed contaner for waste disposal. Wash area until material pickup is complete.
Stable at normal temperatures and pressures.
Strong oxidizing agents.
Oxides of carbon and phosphorous, phosphine.
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Use agent most appropriate to extinguish fire.
Harmful if ingested.
Inflammation and edema of the larynix and bronci. Chemical pneumontis, pulmonary edema and ubrns.
Extremely corrosive to the skin. Causes chemical burns. Absorbed throught the skin.
Corrosive. Corneal damage.
Seek medical attention. If individual is drowsy or unconscious, do not give anything by mouth; place individual on the left side with the head down. Contact a physician, medical facility, or poison control center for advice about whether to induce vomiting. If possible, do not leave individual unattended.
Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.
Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists.
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.