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Parent substance of the natural dye orcein, obtained from certain colorless lichens (Lecanora tinctoria, Rocella tinctoria) by treatment with boiling water; used as an external antiseptic in various skin diseases and in chemistry as a reagent for pentoses.


/or·ci·nol/ (or´sĭ-nol) an antiseptic principle, mainly derived from lichens, used as a reagent in various tests.


, orcinol (or′sĭn) (-ol″)
A chemical derived from lichens and used as a histological stain.
CAS # 504-15-4
References in periodicals archive ?
5-methylresorcinol with a reported purity of > 99% was provided by AS VKG, Estonia and 2,6-dihydroxy-4-methylbenzoic acid, with a purity of > 99%, was provided by Carboshale OU, Estonia.
A method for preparing metal-doped carbon aerogels from oil shale processing by-products 5-methylresorcinol and 2,6-dihydroxy-4-methylbezoic acid was developed.
Analogically to the complex with 5-methylresorcinol [7], the complex formed is assumed to dissociate as a weak acid as follows:
Nitrosation of 5-methylresorcinol and 2,5-dimethylresorcinol.
We have experience with the co-condensation of some methylolxylenols and dimethylolcresols with resorcinol and 5-methylresorcinol (8).
Musso and co-workers carried out basic and experimental studies on phenol oxidation reactions, including autoxidation of 5-methylresorcinol and 2,5-dimethylresorcinol in ammonia and potassium hydroxide [16,17].
Phenol, resorcinol and 5-methylresorcinol were used as both single and mixed substrates in the experiments.
Gels were made from 5-methylresorcinol (MR) and formaldehyde (F) in water (W) and then dried using supercritical C[O.
As 5-methylresorcinol has in addition to two hydroxyl groups a methyl group in the 5th position, a relatively fast gelling in comparison with the resorcinol-formaldehyde gel formation could be expected.
5-Methylresorcinol of purity [greater than or equal to] 96% was obtained from Carboshale, Estonia; Honeyol[TM] which is a product of Viru Keemia Grupp, Estonia, was obtained from Department of Oil Shale Technology of Tallinn University of Technology; the catalysts were [Na.
4 kg per ton of processed oil shale, that of 5-methylresorcinol exceeding 1.
Phenol, p-cresol, o-cresol, resorcinol, 5-methylresorcinol and 2,4-, 2,6-, 3,4- and 3,5-dimethylphenol were used as single substrates in the experiments.

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