# NIOSH Pocket Guide to Chemical Hazards
Phenylhydrazine | CAS 100-63-0
C6H5NHNH2 | RTECS MW8925000
Synonyms & Trade Names Hydrazinobenzene, Monophenylhydrazine | DOT ID & Guide 2572 153
Exposure Limits | NIOSH REL: Ca C 0.14 ppm (0.6 mg/m3) [2-hr] [skin] See Appendix A
OSHA PEL†: TWA 5 ppm (22 mg/m3) [skin]
IDLH Ca [15 ppm] | Conversion 1 ppm = 4.42 mg/m3
Physical Description Colorless to pale-yellow liquid or solid (below 67°F) with a faint, aromatic odor.
MW: 108.1 | BP: 470°F (Decomposes) | FRZ: 67°F | Sol: Slight
VP(77°F): 0.04 mmHg | IP: 7.64 eV |  | Sp.Gr: 1.10
Fl.P: 190°F | UEL: ? | LEL: ? |
Class IIIA Combustible Liquid Combustible Solid
Incompatibilities & Reactivities Strong oxidizers, lead dioxide
Measurement Methods NIOSH 3518
Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated/Daily Remove: When wet or contaminated Change: Daily Provide: Eyewash, Quick drench | First Aid (See procedures) Eye: Irrigate immediately Skin: Soap wash immediately Breathing: Respiratory support Swallow: Medical attention immediately
Respirator Recommendations NIOSH At concentrations above the NIOSH REL, or where there is no REL, at any detectable concentration: (APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode/(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus Escape: Any appropriate escape-type, self-contained breathing apparatus
Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms Skin sensitization, hemolytic anemia, dyspnea (breathing difficulty), cyanosis; jaundice; kidney damage; vascular thrombosis; [potential occupational carcinogen]
Target Organs Blood, respiratory system, liver, kidneys, skin Cancer Site [in animals: tumors of the lungs, liver, blood vessels & intestine]
See also: INTRODUCTION