Most likely a liquid; the ortho and meta isomers are liquids. Para isomer is a crystalline solid.
Registry Numbers and Inventories.
Swiss Giftliste 1
Japan ENCS (MITI)
Vapor pressure, mmHg
2 (25 C)
Vapor density (air=1)
Odor Threshold Odor threshold 0.02 ppm in water.
1.30 g/cm3 (25 C)
Solubility in water
0.014% by wt@ 20 C
Partition coefficient, pKow
3.43 - 3.53
Heat of combustion
Hazards and Protection.
Protect against physical damage. Inside storage should be in a standard flammable liquids storage room or cabinet.
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Maximum 50 ppm. At spill sites of high vapor densities, eye and respiratory equipment and protective clothing are advisable. Use full face mask with self-contained breathing apparatus.
Any self-contained breathing apparatus with a full facepiece and operated in a pressure-demand or other positive pressure mode. Any supplied-air respirator with a full face piece and operated in pressure-demand or other positive pressure mode in combination with an auxiliary self-contained breathing apparatus operated in pressure-demand or other positive pressure mode.
Evacuate area and ventilate. Wear protective equipment. If required, use an inert absrobent. Sweep up and place in an appropriate container for disposal. Wash contaminated surfaces.
Incompatible with strong oxidizing and reducing agents Incompatible with amines, nitrides, azo/diazo compounds, with alkali metals, and with epoxides.
Fire fighting phases: not soluble in water. Use water spray, foam, carbon dioxide, or dry chemical.
Moderately flammable. Combustion with moderate heating.
Withdrawal of pdb in a habituated adult would cause tremulousness and sluggishness. Minimal data are available. <br>Campbell reported a woman who ingested 1 to 2 air freshener blocks per week during her pregnancy. Her offspring developed no abnormalities.
Nausea, vomiting, and diarrhea may occur.
Chronic exposure resulted in pulmonary granulomatosis in one case. Dyspnea was noted in an allergic reaction. Animals chronically exposed to vapors developed pulmonary edema and hyperemia.
P-dichlorobenzene may produce irritation. Hypersensitivity reactions include purpura and hyperpigmentation. Orthodichlorobenzene may produce blistering and hyperpigmentation with prolonged skin contact.
Seek medical assistance.
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.
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
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.
USCG CHRIS Code
36 Halogenated hydrocarbons
IMO Chemical Code
IMO Pollution Category
IMO Hazard code