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

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

SYMPTOM(s): Asphyxia, cardiac arrhythmias, cardiac arrest

HEALTH EFFECTS: Cumulative liver damage (HE3); Asphyxiant (HE17)

ORGAN: Respiratory system, CVS

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