苏糖（英语：Threose，C4H8O4）在分类上属于丁糖与醛糖，从费希尔式的角度看，中间两个碳原子上的羟基在碳骨架的两侧。

CAS：95-43-2
中文别名：D-苏糖;
英文别名：(S-(R*,S*))-2,3,4-trihydroxy-butanal;N-(tert-Butoxycarbonyl)-D-2-phenylglycine;BENZENESULFONAMIDE, 4-CHLORO-N-(1-CYCLOHEXYL-1H-IMIDAZOL-2-YL)-;N-Boc-D-phenylglycine;(1R,2R)-2-Amino-1-(4-methylmercapto-phenyl)-propan-1,3-diol;(S(R*,R*))-2-amino-1-[p-(methylthio)phenyl]propane-1,3-diol;(-)-(1R,2R)-2-Amino-1-<4-(methylthio)phenyl>-1,3-propanediol;(1R,2R)-2-amino-1-(4-methylsulfanyl-phenyl)-propane-1,3-diol;Boc-D-Phg-OH;D-(-)-threose;(2S,3R)-2,3,4-Trihydroxybutanal;Butanal, 2,3,4-trihydroxy-, [S-(R*,S*)]-;Dg-threo-2,3,4-Trihydroxy-butyraldehyd;N-Boc-L-phenylglycine;Boc-(R)-phenylglycine;Boc-D-Phenylglycine;D-N-Boc-phenylglycine;(R)-Boc-phenylglycine;(R*,R*)-(+)-thiomicamine;(R)-2-[(tert-butoxy)carbonylamino]-2-phenylacetic acid;(R(R*,R*))-2-amino-1-[p-(methylthio)phenyl]propane-1,3-diol;D-(-)-threo-2-amino-1-(4-(methylthio)phenyl)-1,3-propanediol;(2R)-2-{[(tert-butoxy)carbonyl]amino}-2-phenylacetic acid;
分子式：C4H8O4
分子量：120.104
精确质量：120.042
Psa：69.92
Logp：-1.9432

UNII：4EHO9A06LX

外观与性状：易潮解的晶体
密度：1.41g/cm3
沸点：311.1ºC at 760mmHg
闪点：156.2ºC
折射率：1.619
储存条件：2-8ºC

海关编码：2912491000