In one study, the combination of 3 percent butyl methoxydibenzoyl-methane and 7 percent padimate O was the most effective of all sunscreens tested.
Avoid butyl stearate, decyl oleate and dioctyl sodium sulfosuccinate.
Considering derivatives primarily concerned with transformations of the hydroxyl group, we may regard our typical acid as a fusion of a radical R CO - (named acetyl, propionyl, butyl, &c., generally according to the name of the hydrocarbon containing the same number of carbon atoms) and a hydroxyl group. By replacing the hydroxyl group by a halogen, acid-haloids result; by the elimination of the elements of water between two molecules, acid-anhydrides, which may be oxidized to acid-peroxides; by replacing the hydroxyl group by the group. SH, thio-acids; by replacing it by the amino group, acid-amides (q.v.); by replacing it by the group - NH NH2, acid-hydrazides.
198 I° Butyl pentoate..
C 4 BUTYL ALCOHOLS H 9 OH.
Normal butyl alcohol, CH 3 (CH 2) 2 CH 2 OH, is a colourless liquid, boiling at 116.8°, and formed by reducing normal butyl aldehyde with sodium, or by a peculiar fermentation of glycerin, brought about by a schizomycete.
Isobutyl alcohol, (CH 3) 2 CH CH 2 OH, the butyl alcohol of fermentation, is a primary alcohol derived from isobutane.
Trimethyl carbinol or tertiary butyl alcohol, (CH 3) 3.
Nencki showed, however, that if both these organisms occur together, the resulting products contain large quantities of normal butyl alcohol, a substance neither bacterium can produce alone.
The following monatomic alcohols receive special treatment under their own headings: - Alcohol (Ethyl), Allyl Alcohol, Amyl Alcohols, Benzyl Alcohol, Butyl Acohols, Methyl Alcohol, and Propyl Alcohols.