Table 3.

Detection frequencies and concentration distribution for metabolites included in regression models (n = 488).

Parent VOC	Metabolite (Short Name)	Metabolite (Full Name)	Detection Frequency (%)	Percentiles (ng/mL)		Maximum (ng/mL)
				50th	75th
Acrolein	CEMA	N-Acetyl-S-(2-carboxyethyl)-l-cysteine	99	71.8	124	2260
	3HPMA	N-Acetyl-S-(3-hydroxypropyl)-l-cysteine	100	240	403	14,400
Acrylamide	GAMA	N-Acetyl-S-(2-carbamoyl-2-hydroxyethyl)-l-cysteine	49	<9.4 *	15.61	203
	AAMA	N-Acetyl-S-(2-carbamoylethyl)-l-cysteine	100	33.3	55.23	582
Acrylonitrile	CYMA	N-Acetyl-S-(2-cyanoethyl)-l-cysteine	83	1.33	2.22	812
Benzene	PMA	N-Acetyl-S-(phenyl)-l-cysteine	52	0.642	1.11	12.3
	MU	t,t-Muconic acid	92	245	391	4090
1-Bromopropane	BPMA	N-Acetyl-S-(n-propyl)-l-cysteine	99	2.61	9.44	4260
1,3-Butadiene	DHBMA	N-Acetyl-S-(3,4-dihydroxybutyl)-l-cysteine	100	281	431	1730
	MHBMA3	N-Acetyl-S-(4-hydroxy-2-buten-1-yl)-l-cysteine	94	6.90	12.1	597
Carbon disulfide	TTCA	2-Thioxothiazolidine-4-carboxylic acid	66	5.91	13.3	483
Crotonaldehyde	HPMMA	N-Acetyl-S-(3-hydroxypropyl-1-methyl)-l-cysteine	100	342	592	17,700
N,N-Dimethylformamide	AMCC	N-Acetyl-S-(N-methylcarbamoyl)-l-cysteine	100	66.6	127	2950
Ethylbenzene, styrene	PGA	Phenylglyoxylic acid	93	208	356	2130
Ethylene oxide, vinyl chloride, acrylonitrile	HEMA	N-Acetyl-S-(2-hydroxyethyl)-l-cysteine	70	0.963	1.72	33.4
Hydrogen cyanide	SCN¯	Thiocyanate	100	832	1435	19,100
Propylene oxide	2HPMA	N-Acetyl-S-(2-hydroxypropyl)-l-cysteine	98	44.6	86.1	2660
Styrene	MA	Mandelic acid	99	208	302	2190
	PHEMA	N-Acetyl-S-(1-phenyl-2-hydroxyethyl)-l-cysteine + N-Acetyl-S-(2-phenyl-2-hydroxyethyl)-l-cysteine	24	<0.7 *	<0.7 *	9.84
Toluene	BMA	N-Acetyl-S-(benzyl)-l-cysteine	99	5.62	12.1	519
Xylene	2MHA	2-Methylhippuric acid	95	21.2	41.8	3810
	3MHA + 4MHA	3-Methylhippuric acid & 4-methylhippuric acid	100	150	306	17,800

* Below LOD. Parent VOC, refers to the compound that the metabolite originates from.