International Chemical Safety Cards DIBENZO(a,h)ANTHRACENE ICSC: 0431 1,25,6-Dibenzanthracene C22H14 Molecular mass: 278.4 ICSC #    0431 CAS #     53-70-3 RTECS # HN2625000 EC #         601-041-00-2 October 23, 1995 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Combustible. NO open flames. Water spray, powder. EXPLOSION EXPOSURE AVOID ALL CONTACT!  •INHALATION Local exhaust or breathing protection. Fresh air, rest.  •SKIN Redness. Swelling. Itching. Protective gloves. Protective clothing. Remove contaminated clothes. Rinse and then wash skin with water and soap.  •EYES Redness. Face shield, or eye protection in combination with breathing protection. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.  •INGESTION Do not eat, drink, or smoke during work. Wash hands before eating. Rinse mouth. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Sweep spilled substance into sealable containers; if appropriate, moisten first to prevent dusting. Carefully collect remainder, then remove to safe place. (Extra personal protection: P3 filter respirator for toxic particles). Well closed. T symbol R: 45 S: 53-45 SEE IMPORTANT INFORMATION ON BACK ICSC: 0431 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

International Chemical Safety Cards DIBENZO(a,h)ANTHRACENE ICSC: 0431 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: COLOURLESS CRYSTALLINE POWDER. PHYSICAL DANGERS: CHEMICAL DANGERS: OCCUPATIONAL EXPOSURE LIMITS: TLV not established. ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation, through the skin and by ingestion. INHALATION RISK: Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly. EFFECTS OF SHORT-TERM EXPOSURE: EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: The substance may have effects on the skin , resulting in photosensitization. This substance is probably carcinogenic to humans. PHYSICAL PROPERTIES Boiling point: 524°C Melting point: 267°C Relative density (water = 1): 1.28 Solubility in water: none Octanol/water partition coefficient as log Pow: 6.5 ENVIRONMENTAL DATA In the food chain important to humans, bioaccumulation takes place, specifically in seafood. N O T E S This is one of many polycyclic aromatic hydrocarbons - standards are usually established for them as mixtures, e.g., coal tar pitch volatiles. However, it may be encountered as a laboratory chemical in its pure form. Insufficient data are available on the effect of this substance on human health, therefore utmost care must be taken. Do NOT take working clothes home. DBA is a commonly used name. This substance is one of many polycyclic aromatic hydrocarbons (PAH). ADDITIONAL INFORMATION ICSC: 0431 DIBENZO(a,h)ANTHRACENE (C) IPCS, CEC, 1994

IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.