CHLOROACETALDEHYDE
CH2ClCHO
MW: 78.50
METHOD: 2015, Issue 1
CAS: 107-20-0
2015
RTECS: AB2450000
EVALUATION: FULL
OSHA : C 1 ppm NIOSH: C 1 ppm ACGIH: C 1 ppm (1 ppm = 3.21 mg/m 3 @ NTP)
Issue 1: 15 August 1994
PROPERTIES: liquid; d 1.236 g/mL @ 20 °C; sp. gr. (40% aq. soln.) 1.19; BP 85 °C; MP -16.3 °C; VP 13.3 kPa (100 mm Hg)
SYNONYMS: 2-chloroacetaldehyde; 2-chloroethanal
SAMPLING SAMPLER:
SOLID SORBENT TUBE (silica gel, 520 mg/260 mg)
FLOW RATE:
0.05 to 0.2 L/min (0.2 L/min for 15-min ceiling sample)
VOL-MIN: -MAX:
MEASUREMENT 63
TECHNIQUE:
GAS CHROMATOGRAPHY,
ANALYTE:
chloroacetaldehyde
DESORPTION:
25 mL 50% aqueous methanol, 30 min
0.3 L @ 1 ppm 16 L
INJECTION VOLUME:
2 µL with 3 µL water as flush
SHIPMENT:
routine; submit separate bulk sample
SAMPLE STABILITY:
TEMPERATURE-INJECTION: -DETECTOR: -COLUMN:
at least 7 days @ 25 °C
FIELD BLANKS:
2 to 10 field blanks per set
BIAS:
5% argon in methane, 50 mL/min
COLUMN:
glass, 1.8 m x 6 mm OD, packed with 60/80 mesh Chromosorb 101
CALIBRATION:
standard solutions of chloroacetaldehyde in 50% aqueous methanol
1.8 to 6.4 mg/m 3 (3-L samples)
RANGE:
1 to 19 µg per sample [1]
-0.4%
ESTIMATED LOD: 0.1 µg per sample [1]
ˆ ): 0.060 [1] OVERALL PRECISION (S rT ACCURACY:
250 °C 300 °C 150 °C
CARRIER GAS:
ACCURACY RANGE STUDIED:
Ni ECD
PRECISION (Sr):
0.036 [1]
±12.2%
APPLICABILITY: The working range is 0.1 to 2 ppm (0.33 to 6.3 mg/m 3) for a 3-L air sample. The method is not able to distinguish between chloroacetaldehyde and the monomer or dimer hydrate forms of chloroacetaldehyde.
INTERFERENCES: None identified.
OTHER METHODS: This is method S11 [2] in a revised format. Chloroacetaldehyde in air has also been determined by differential pulse polarography [3].
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94
