Synonym: DTT, Cleland’s Reagent;
Chemical Name: 1,4-Butanedithiol, 2,3-dihydroxy
[27565-41-9], C4H10O2S2, 154.25, mp 39-43°C

There are two chiral carbons (chiral centres) in the molecular of
HSCH2CH(OH)CH(OH)CH2SH, They are (2R,3R), (2R,3S), (2S,3R), and (2S,3S):

The one from our process is in the form of (2R,3R), or (2S,3S), or a 1:1 mixture of (2R,3R) and (2S,3S). In the last case, it is described as (2R*,3R*), the CAS No. for this form is 27565-41-9.

Note: The CAS No. of (2R,3R) form of 1,4-Dithiothreitol is 3483-12-3.
Chemical Name: (2R,3R)-rel-1,4-Dimercapto-2,3-butanediol;
Additional Names: Cleland's reagent; threo-2,3-dihydroxy-1,4-dithiolbutane.

A typical CoA of our DTT can be provided on request.