Daminozide — also known as Alar, Kylar, B-NINE, DMASA, SADH, or B 995 — is a plant growth regulator, a chemical sprayed on fruit to regulate their growth, make their harvest easier, and keep apples from falling off the trees before they are ripe. This makes sure they are red and firm for storage. Alar was first approved for use in the U.S. in 1963, it was primarily used on apples until 1989 when it was voluntarily withdrawn by the manufacturer after the U.S. Environmental Protection Agency proposed banning it based on concerns about cancer risks to consumers.

CAS：1596-84-5
中文别名：琥珀酸-2,2-二甲基酰肼;比久;单(2,2-二甲基酰肼)丁二酸酰肼;丁二酸-N,N-二甲基酰肼;N-二甲基琥珀酰肼酸;
英文别名：ALAR;Daminozide;4-(2,2-dimethylhydrazinyl)-4-oxobutanoic acid;DMASA;succinic acid 2,2-dimethylhydrazide;Succinic Acid 2,2-Dimethylhydrazide;Succinic 2,2-dimethylhydrazide;dyak;butanedioic acid mono(2,2-dimethylhydrazide);SADH;Dimas;NINE;N-dimethylamino succinamic acid;Succinic acid mono(2,2-dimethylhydrazide);N-(dimethylamino)succinamic acid;Butanedioic acid, mono(2,2-dimethylhydrazide);B-995;
分子式：C6H12N2O3
分子量：160.171
精确质量：160.085
Psa：69.64
Logp：-0.1651

MDL号：MFCD00002787

外观与性状：白色晶体粉末
密度：1.183g/cm3
熔点：162-164°C(lit.)
水溶解性：100 g/L
稳定性：Stable. Combustible. Incompatible with strong oxidizing agents, strong bases, strong acids, wetting agents, oils, copper-containing compounds.
储存条件：库房通风低温干燥,与食品原料分开储运

RTECS号：WM9625000
安全说明：S36/37
WGK Germany：2
危险类别码：R40
海关编码：2928000031
危险品标志：Xn

生产方法
以丁二酸为原料,先脱水制得丁二酸酐,再与偏二甲肼在乙腈中缩合而得。操作步骤是:将丁二酸一次投入反应釜,升温至215℃左右,开始脱水,直至釜温升至260℃左右,出水量达到理论量。在缩合釜中投入乙腈,再中入丁二酸酐,当料温控制在18℃时,慢慢滴加偏二甲肼,反应结束后,离心过滤、干燥得比久。 是一种生长抑制剂。通常由叶和茎吸收进入植物体内传导到作用部位，能抑制新梢生长，缩短节间长度等。结构式。
用途
是一种生长抑制剂。通常由叶和茎吸收进入植物体内传导到作用部位，能抑制新梢生长，缩短节间长度等。结构式。