3,5-Dinitro-ortho-cresol; 3,5-Dinitro-o-cresol; 4,6-Dinitro-2-hydroxytoluene; DNOC, 2-methyl-3,5-dinitrophenol, 4,6-Dinitro-o-cresol, 3,5-Dinitro-2-hydroxytoluene, 4,6-Dinitro-2-methyl phenol, DNC
|Molar mass||198.13 g·mol−1|
|Melting point||86.5 °C (187.7 °F; 359.6 K)|
|Boiling point||312 °C (594 °F; 585 K)|
|Vapor pressure||0.00005 mmHg (20°C)|
|Flash point||noncombustible |
|Lethal dose or concentration (LD, LC):|
LD50 (Median dose)
|7 mg/kg (oral, rat)
50 mg/kg (oral, cat)
21 mg/kg (oral, mouse)
24.6 mg/kg (oral, rabbit)
24.6 mg/kg (oral, guinea pig)
31 mg/kg (oral, rat)
|US health exposure limits (NIOSH):|
|TWA 0.2 mg/m3 [skin]|
|TWA 0.2 mg/m3 [skin]|
IDLH (Immediate danger
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Dinitro-ortho-cresol (DNOC) is an organic compound with the structural formula CH3C6H2(NO2)2OH. It is a yellow solid that is only slightly soluble in water. DNOC and some related derivatives have been used as herbicides.
This compound is prepared by disulfonation of o-cresol. The resulting disulfonate is then treated with nitric acid to give DNOC. A variety of related derivatives are known including those where the methyl group is replaced by sec-butyl ("dinoseb"), tert-butyl ("dinoterb"), and 1-methylheptyl ("dinocap"). These are prepared by the direct nitration of the alkyphenols.
Applications and safety
- "NIOSH Pocket Guide to Chemical Hazards #0234". National Institute for Occupational Safety and Health (NIOSH).
- "Dinitro-o-cresol". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH). 4 December 2014. Retrieved 17 March 2015.
- Gerald Booth "Nitro Compounds, Aromatic" in "Ullmann's Encyclopedia of Industrial Chemistry" 2007; Wiley-VCH, Weinheim. doi:10.1002/14356007.a17_411
- Parker, V. H.; Barnes, J. M.; Denz, F. A. (1951). "Some Observations on the Toxic Properties of 3:5-Dinitro-Ortho-Cresol". Occupational and Environmental Medicine 8 (4): 226. doi:10.1136/oem.8.4.226.
- Harvey, DG; Bidstrup, PL; Bonnell, JA (1951). "Poisoning by dinitro-ortho-cresol; some observations on the effects of dinitro-ortho-cresol administered by mouth to human volunteers". British Medical Journal 2 (4722): 13–6. doi:10.1136/bmj.2.4722.13. PMC 2069381. PMID 14839311.
- Chemical poisoning - Dinitrocresol
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