Cresols


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Related to Cresols: P-Cresol, metacresol

Cresols

 

(methylhydroxybenzenes, methylphenols), CH3C6H4OH, liquids with a characteristic unpleasant odor. There are three known isomers: meta-, ortho-, and para-cresol (see Table 1).

Cresols have limited solubility in water. They are easily soluble in organic solvents. Cresols are weak acids and form salts called cresolates when dissolved in bases.

In industry, cresols are obtained from coal tar, resin, and pitch and by synthesis from toluene. The isolation of o-cresols from a mixture of the isomers is achieved by fractional distillation. Chemical methods are used to isolate m-cresol and p-cresol.

Cresols are used in making dyes, medicines, explosives, fragrances, flotation agents, and antitoxidants.

References in periodicals archive ?
Phenol and cresols were biodegraded by 80%, but the concentration of dimethylphenols practically did not change.
Phenol, cresols, formaldehyde and other components of resin binders and acids and alkalines used as catalysts, which would be present in many waste foundry sands (including green sand), would probably result in the waste being treated as special waste.
Analysis of structure/functional property relationships for novolak resins containing cresols has only been recently reported (13- 15).
Dimers of the meta or para-cresols with the 2,3,5 trimethyl phenol with a small amount of dimers of the meta or para cresols or cross products were found under these conditions (18).
We had found convenient development conditions for a three-component resist formulation (halogenophenol novolac/cresol novolac/melamine crosslinker Cymel 303) containing cresol novolac additionally.
Reportlinker Adds Production and Market of Cresols in China
Cresols as key fine chemical intermediates play an important role in producing antioxidant, Vitamin E, pesticides, flavor and so on.
What is the situation of cresols production in China?
The fact that this value was higher than the values for p-cresol, 5-methylresorcinol, resorcinol and o-cresol indicates that phenol was more readily oxidized by the studied activated sludge than cresols or resorcinols.
The obtained results showed that phenol, hydroxyphenols and cresols were degraded by activated sludge faster than dimethylphenols.
A) Astringent Drug Products -- Acetone, Alcohol, Alum (Ammonium), Alum (Potassium), Aluminum Chlorhydroxy Complex, Aromatics, Benzalkonium Chloride, Benzethonium Chloride, Benzocaine, Benzoic Acid, Boric Acid, Calcium Acetate, Camphor Gum, Clove Oil, Colloidal Oatmeal, Cresol, Cupric Sulfate, Eucalyptus Oil, Ugenol, Honey, Isopropyl Alcohol, Menthol, Methyl Salicylate, Oxyquinoline Sulphate, P-T-Butyl-M-Cresol, Peppermint Oil, Phenol, Polyoxytheylene Laurate, Potassium Ferrocyanide, Sage Oil, Silver Nitrate, Sodium Borate, Sodium Diacetate, Talc, Tannic Acid Glycerite, Thymol, Topical Starch, Zinc Chloride, Zinc Oxide, Zinc Phenolsulfonate, Zinc Stearate, Zinc Sulfate.