PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Hydroquinone 123-31-9 2662
13.00
15.01
4.01
11.01
14.02
4.08
4.05
7.01
8.00
7.00
Formula Synonyms
C6H6O2 HYDROQUINONE, P-PHENYLENEDIOL, P-QUINOL, PARA-DIHYDROXYBENZENE, PARA-DIOXYBENZENE, PARA-HYDROQUINONE, PHIAQUIN, PYROGENTISIC ACID, QUINNONE, QUINOL, TECQUINOL, TENOX HQ, TEQUINOL, UN 2662, USAF EK-356, 1,4-BENZENEDIOL, 1,4-BENZOQUINOL, 1,4-DIHYDROXYBENZENE, 4-HYDROXYPHENOL, AIDA, ALPHA-HYDROQUINONE, ARCTUVIN, BENZENE, P-DIHYDROXY-, BENZOHYDROQUINONE, BENZOQUINOL, BETA-QUINOL, BLACK AND WHITE BLEACHING CREAM, BQ(H), DIAK 5, DIHYDROQUINONE, DIHYDROXYBENZENE, ELDOPAQUE, ELDOQUIN, HE 5, HIDROQUINONA (DOT SPANISH), HYDROQUINOL, HYDROQUINOLE, HYDROQUINONE (DOT FRENCH), NCI-C55834, P-BENZENEDIOL, P-DIHYDROQUINONE, P-DIHYDROXYBENZENE, P-DIOXOBENZENE, P-DIOXYBENZENE, P-HYDROQUINONE, P-HYDROXYPHENOL
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
110.12 S 172 285 25 1.358 @ 20°C
PAC Values
PAC Values (Original Units: mg/m3)
PAC-1 PAC-2 PAC-3
3 20 120
Converted PAC Values (ppm)
PAC-1 PAC-2 PAC-3
0.67 4.4 27
Technical Basis
No technical basis available
References
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PAC values marked with a subscript "A" correspond to 60-minute AEGL values.
PAC values marked with a subscript "E" correspond to ERPG values.
PAC values marked by * are >= 10% lower explosive limit (LEL) but < 50% LEL.
PAC values marked by ** are > 50% LEL but < 100% LEL.
PAC values marked by *** are >= LEL.