DI(2-ETHYLHEXYL) PHTHALATE See DIBUTYL PHTHALATE (Method 5020) for Procedure
C6H4(COOCH2CH(C2H5)(CH2)3CH3)2 METHOD: 5020, Issue 2
MW: 390.56
CAS: 117-81-7
RTECS: TI0350000
EVALUATION: PARTIAL
OSHA : 5 mg/m 3; STEL 10 mg/m 3 NIOSH: 5 mg/m 3; STEL 10 mg/m3 (carcinogen) ACGIH: 5 mg/m 3; STEL 10 mg/m 3 (suspect carcinogen)
PROPERTIES:
Issue 1: 15 May 1985 Issue 2: 15 August 1994
oily liquid; d 0.983 g/mL @ 20 °C; MP -50 °C; BP 386 °C; VP < 1 Pa (0.01 mm Hg) @ 20 °C
SYNONYMS: bis(2-ethylhexyl) phthalate; dioctyl phthalate; DOP; DEHP (listed incorrectly as di-sec-octyl phthalate in 29 CFR 1910.23) SAMPLING
MEASUREMENT
SAMPLER:
FILTER (0.8 µm cellulose ester membrane)
FLOW RATE:
1 to 3 L/min
VOL-MIN: -MAX:
6 L @ 5 mg/m 3 200 L
SHIPMENT:
routine
SAMPLE STABILITY:
unknown
TEMPERATURE-INJECTION: -DETECTOR: -COLUMN:
BLANKS:
2 to 10 field blanks per set
CARRIER GAS:
He, 30 mL/min
COLUMN:
2 m x 3-mm OD stainless steel, 5% OV-101 on 100/120 mesh Chromosorb W-HP
CALIBRATION:
solutions of analytes in CS 2 with internal standard
RANGE:
30 to 500 µg per sample
ACCURACY RANGE STUDIED:
2 to 11 mg/m 3 [2] (32-L samples)
BIAS:
7.56%
TECHNIQUE:
GAS CHROMATOGRAPHY, FID
ANALYTE:
di(2-ethylhexyl)phthalate
DESORPTION:
2 mL CS 2; 30 min in ultrasonic bath
INJECTION VOLUME: 5 µL 300 °C 300 °C 200 to 250 °C
ESTIMATED LOD: 10 µg per sample
ˆ rT): 0.057 [1,2] OVERALL PRECISION (S ACCURACY:
± 19.2%
PRECISION (Sr):
0.05 @ 0.07 to 0.3 mg per sample [2]
APPLICABILITY: The working range is 1 to 20 mg/m 3 for a 30-L air sample. Phthalates are widely used as plasticizers for many resins and elastomers.
INTERFERENCES: None identified. An alternate GC column is 10 m x 0.25-mm ID, 0.25-µm DB-1, fused silica capillary.
OTHER METHODS: This revises method S40 [4].
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94