бутил пропионаты

HOC 6 H 4 COOC 2 H 5 Crystals with a melting point of 116_C that are soluble in water, alcohol, and ether; used as a preservative for pharmaceuticals. Also known as ethylparaben.

этил метакрилаты

化学; 有机化学

CH 2 CCH 3 COOC 2 H 5 Colorless, easily polymerized liquid, water-insoluble; used to produce polymers and chemical intermediates.

амил пропионаты

化学; 有机化学

CH 3 CH 2 COOC 5 H 11 A colorless liquid with an applelike odor and a distillation range of 135–175_C; used in perfumes, lacquers, and flavors.

абиетин қышқылы

化学; 有机化学

C 20 H 30 O 2 A tricyclic, crystalline acid obtained from rosin; used in making esters for plasticizers.

альфин катализаторы

化学; 有机化学

A catalyst derived from reaction of an alkali alcoholate with an olefin halide; used to convert olefins (for example, ethylene, propylene, or butylenes) into polyolefin polymers.

бензотиазоль

化学; 有机化学

C 6 H 4 SCHN A thiazole fused to a benzene ring; can be made by ring closure from o-amino thiophenols and acid chlorides; derivatives are important industrial products.

целлюлозалық

化学; 有机化学

Any of the derivatives of cellulose, such as cellulose acetate.

3,5-диаминобензоқышқыл

化学; 有机化学

C 7 H 8 N 2 O 2 Monohydrate crystals with a melting point of 228_C; soluble in organic solvents such as alcohol and benzene; used in the detection and determination of nitrites.

аланил

化学; 有机化学

The radical CH 3 CHNH 2 CO_; occurs in, for example, alanyl alanine, a dipeptide.

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