Chiral standards are  used in the chiral chromatography to measure to measure the difference in the absorption coefficients between left handed and right handed cicularly polarized light.

CAS Number
42437-96-7
Alternate CAS Number
25333-42-0(freebase); 1884696-28-9(DBTA Salt)
CAS Number
61341-86-4
Alternate CAS Number
32457-23-1 (HCl salt)
CAS Number
125-73-5
Alternate CAS Number
69376-27-8(HCl Salt);143-98-6(Tartrate Salt)
CAS Number
1177494-18-6
Alternate CAS Number
1177419-85-0(HCl Salt)