NAME: alpha-Methyl Styrene

SYNONYM(s): 1-Methyl-1-phenylethylene; AMS

IMIS: 1782

CAS: 98-83-9

NIOSH: RTECS WL5250000; 79131

DESCRIPTION:

Colorless liquid with a characteristic odor.
MW: 118
BP: 329 F
VP: 1.9 mm
MP: -9 F

INCOM: Oxidizers, peroxides, halogens, catalysts for vinyl or ionic polymers; aluminum, iron chloride

OSHA GENERAL INDUSTRY PEL: 100 ppm, 480 mg/m3 Ceiling

OSHA CONSTRUCTION INDUSTRY PEL: 100 ppm, 480 mg/m3 Ceiling

ACGIH TLV: 50 ppm, 242 mg/m3 TWA; 100 ppm, 483 mg/m3 STEL

NIOSH REL: 50 ppm TWA, 100 ppm STEL

SYMPTOM(s): Eye, nose, throat irritation; drowsiness; dermatitis

HEALTH EFFECTS: Irritation-Eyes, Nose, Throat---Mild (HE15) CNS effects (HE7); Narcosis (HE8)

ORGAN: Eyes, respiratory system, skin

PRIMARY SAMPLING/ANALYTICAL METHOD (SLC1):

MEDIA: Charcoal Tube (100/50 mg sections, 20/40 mesh)
ANL SOLVENT: Carbon Disulfide
MAX V: 3 Liters   MAX F: 0.2 L/min (STEL)
MIN T: 15 Minutes   MAX F: 0.2 L/min (Ceiling)
ANL 1: Gas Chromatography; GC/FID
REF: 1 (NIOSH 1501)
SAE: 0.09
CLASS: Partially Validated

SECONDARY SAMPLING/ANALYTICAL METHOD (SAM2):

DEVICE: Detector Tube COMPANY: Kitagawa
PART #: 193S RANGE: 10-500 ppm
CLASS: Mfg
DEVICE: Instrumentation COMPANY: Infrared Spectrophotometer
PART #: MIRAN 1A & 1B RANGE: 0.7 ppm @ 11.3 um
CLASS: Mfg
DEVICE: Instrumentation COMPANY: Infrared Spectrophotometer
PART #: MIRAN 103 RANGE: 0-100 ppm @ 11.3 um
CLASS: Mfg