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CRUDE OIL Page 3 of 8 limited to. one or more of the foil-owing: nasal d:scnarge, sore throat, couahino, oroncn.t:s, pulmonary eaema and difficulty in breath.na. Proionoed breathing o: vapors can cause central nervous systeve:'_ects. Sans and symptoms a= central nervous system effects may include one or more o: the followlnc• neadache, d=zc:ness, loss of appetite, weaxness and loss o: coordination. This hazard evaluation :s based on the Known toxicity of the ingredients in this substance. This sucstance contains sulfur compounds whim may fora hyarogen sulfide. The rotten eggs oaor of ^ydroge^ sulfide is unreliable as an indicator of concentration. Signs and symptoms of overexposure to nydrogen sulfide include resn:ratoryrtract irritation. headaches, dizziness, nausea, gastrointestinal dzsturnances, cougn.ng, a sensation of dryness and pain :n the rose, throat and chest, confusion and unconsciousness. Hydrogen sulfide concentrations of 1000-2000 ppm can ae e+stret^e_y Hazardous. This suastance is bion-y toxic to intern;.! organs r :rnaied. The degree of _n1ury will depend or the a_rnorne' concentratior and duration of exposure. Read the Add_t:cna_ Healtn Data section (12) of this document for more information. INGESTION: Tne ora- tox:c:tr Of t»:s suastance nas not been determined. However, may be sligrtly toxic to interna_ organs _+ sera'-lowed. The degree of + _n1u.v w1:- det)end or the amount arsor ped from the out. This nzzard evaivat:or :s based on tae known toxicity of. tae ingredients is tnis suastance. Because of the low viscosity of tcls suastance, .t can directly enter the lungs :f :t is swallowed (this is called aso.ration) . This can occur during the act of swallowing or wnen votrzt:ng the suastance. Once in the lungs, the substance is very d-_fizult to remove and can cause severe 1nau.y to the lungs and death. 4. PROTECTIVE EQUIPMENT EYE PROTECTION: Do not get this mater.al in your eyes. Eve contact can ne avoided ov wear:na cnemical coocles. SKIN PROTECTION: No snec,a_ sx.r arotect_er :s us Lally necessary. Avoid Drolonced or frequently recreated Skin contact with this material. Skin contact cat me minimized by wearing protective clothing. RESPIRATORY PROTECTION: This material may be an inhalation hazard and, unless ventilation is adequate, the use of approved respiratory protection is recommended. Note; If any of the applicable hydrogen sulfide standards are likely to be exceeded, positive supplied-air resa.ratory protection must be used. The ACG:H TWA for hydrogen sulfide is 10 ppm. The OSHA STEL is 12-ppm. Refer to the OSHA Benzene Standard to determine u nat type of respirator :s required based on exposure levels. VENTILATION: Use this material only in well ventilated areas. 5. FIRE PROTECTION Revision Number: 8 Revision Date: 06/19/90 MSDS Number: 002493 NDA - No Data Available NA - Not APPlfca:ble i I x-00S02i (01-891