NAME: Methylal
SYNONYM(s): Methyl formal; Formal; Dimethylacetal formaldehyde; Dimethoxymethane
IMIS: 1655
CAS: 109-87-5
NIOSH: RTECS PA8750000; 47896
DOT: UN1234 Flammable Liquid
DESCRIPTION:
Colorless liquid with a pungent odor.
MW: 76
BP: 111 F
VP: 330 mm
MP: -157 F
INCOM: Strong oxidizers, acids
Exposure Limits
OSHA GENERAL INDUSTRY PEL: 1000 ppm, 3100 mg/m3
OSHA CONSTRUCTION INDUSTRY PEL: 1000 ppm, 3100 mg/m3 TWA
ACGIH TLV: 1000 ppm, 3110 mg/m3 TWA
NIOSH REL: 1000 ppm TWA
Health Factors
SYMPTOM(s): Mild eye, upper respiratory irritation; anesthesia; skin irritation
HEALTH EFFECTS: Cumulative systemic toxicity (HE3) Irritation-Eyes, Nose, Throat---Moderate (HE15) HISTORY M187 lab, 3/82
ORGAN: Skin, respiratory system, CNS
Monitoring
PRIMARY SAMPLING/ANALYTICAL METHOD (SLC1):
MEDIA: Charcoal Tube (100/50 mg sections, 20/40 mesh)
ANL SOLVENT: Hexane
MAX V: 2.0 Liters MAX F: 0.2 L/min
ANL 1: Gas Chromatography; GC/FID
REF: 1 (NIOSH 1611)
SAE: 0.10
CLASS: Fully Validated
SECONDARY SAMPLING/ANALYTICAL METHOD (SAM2):
DEVICE: Instrumentation COMPANY: Infrared Spectrophotometer
PART #: MIRAN 1A & 1B RANGE: 0.1 ppm @ 9.5 um
CLASS: Mfg
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