NAME: Dichloromonofluoromethane
SYNONYM(s): Refrigerant 21; Freon 21; Dichlorofluoromethane; F-21
IMIS: 0887
CAS: 75-43-4
NIOSH: RTECS PA8400000; 47892
DOT: UN1029 Non-Flammable Liquid
DESCRIPTION:
Colorless liquid or gas with a slight ether-like odor.
MW: 103
BP: 48 F
MP: -211 F
INCOM: Chemically active metals: sodium, potassium, calcium, powdered aluminum, zinc, magnesium
Exposure Limits
OSHA GENERAL INDUSTRY PEL: 1000 ppm, 4200 mg/m3
OSHA CONSTRUCTION INDUSTRY PEL: 1000 ppm, 4200 mg/m3 TWA
ACGIH TLV: 10 ppm, 42 mg/m3 TWA
NIOSH REL: 10 ppm TWA
Health Factors
SYMPTOM(s): Asphyxia, cardiac arrhythmias, cardiac arrest
HEALTH EFFECTS: Cumulative liver damage (HE3); Asphyxiant (HE17)
ORGAN: Respiratory system, CVS
Monitoring
PRIMARY SAMPLING/ANALYTICAL METHOD (SLC1):
MEDIA: Two Charcoal Tubes (400/200 mg sections, 20/40 mesh) in series (See note)
ANL SOLVENT: Carbon Disulfide
MAX V: 3 Liters MAX F: 0.05 L/min
ANL 1: Gas Chromatography; GC/FID
REF: 1 (NIOSH 2516)
SAE: 0.10
CLASS: Fully Validated
NOTE: Before sampling, remove the large section of charcoal from one tube and the small section of charcoal from the other tube. Connect the tubes in series so the air passes through the large section of charcoal first.
SECONDARY SAMPLING/ANALYTICAL METHOD (SAM2):
MIRAN 1A & 1B: MIN. Det. Con. 0.08 ppm at 9.4 um
Organic Vapor Analyzer
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