PROPYLENE OXIDE
C3H6O
MW: 58.08
METHOD: 1612, Issue 2
CAS: 75-56-9
1612
RTECS: TZ2975000
EVALUATION: PARTIAL
OSHA : 100 ppm NIOSH: lowest feasible (carcinogen); Group I Pesticide ACGIH: 20 ppm (1 ppm = 2.37 mg/m 3 @ NTP)
PROPERTIES:
Issue 1: 15 May 1985 Issue 2: 15 August 1994
liquid; d 0.8287 g/mL @ 20 °C; BP 34 C; MP -104 °C; VP 59 kPa (442 mm Hg; 58% v/v) @ 20 °C; explosive range 2.1 to 37% (v/v) in air
SYNONYMS: 1,2-epoxypropane; methyloxirane
SAMPLING SAMPLER:
SOLID SORBENT TUBE (coconut shell charcoal, 100 mg/50 mg)
MEASUREMENT TECHNIQUE:
GAS CHROMATOGRAPHY, FID
ANALYTE:
propylene oxide
FLOW RATE:
0.01 to 0.2 L/min
DESORPTION:
1 mL CS 2; stand 30 min
VOL-MIN: -MAX:
0.5 L @ 100 ppm 5L
INJECTION VOLUME:
5 µL
SHIPMENT:
refrigerated
TEMPERATURE-INJECTION: -DETECTOR: -COLUMN:
SAMPLE STABILITY:
not determined
FIELD BLANKS:
2 to 10 field blanks per set
190 °C 255 °C 40 °C, 6 min; 50 °C/min to 250 °C
CARRIER GAS:
N 2, 1 mL/min; makeup 29 mL/min
COLUMN:
30 m x 0.32-mm fused silica capillary column, 1.0-µm DB-5 [2]
CALIBRATION:
propylene oxide in CS 2
RANGE:
0.03 to 3 mg per sample [2]
ACCURACY 121 to 482 mg/m 3 [1] (5-L samples)
RANGE STUDIED: BIAS:
- 1.8%
ESTIMATED LOD: 0.01 mg per sample
ˆ ): 0.085 [1] OVERALL PRECISION (S rT ACCURACY:
± 11.9%
PRECISION (Sr):
0.029 @ 0.6 to 2.4 mg per sample [1]
APPLICABILITY: The working range is 8 to 295 ppm (20 to 700 mg/m 3) for a 5-L air sample [1].
INTERFERENCES: None found.
OTHER METHODS: This revises method S75 [3].
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94
