should sodium lipoate react with ascorbic acid? - (Mar/14/2017 )

Hi, 

In short:

what would be the product of:  C₆H₈O_{6 (ascorbic acid)} + NaC₈H₁₃O₂S_{2 (alpha lipoic acid sodium salt) -----> ?}

Explanation:

I've bought R-Alpha lipoic acid powder (but i'm not sure how pure it's).  I mixed 500mg  of ALA with 250mg sodium bicarbonate to get Sodium Lipoate, 30 minutes later (when the reaction is over)  I added some 250mg of pure ascorbic acid to the final mixture and some small amount of insoluble sulfuric color goo formed. my question: Is this an impurity in ALA ? In other words: should Sodium lipoate react with ascorbic acid in anyway? if it reacts what are the reaction's products? 

Thanks in advance 

Ascorbic acid is a reducing agent and the lipoic acid contains a disulfide bond, and these are prone to be reduced,

https://en.wikipedia.org/wiki/Disulfide#Reactions

so you probably formed dihydrolipoate in a first step...  something similar to this

https://biocyc.org/META/NEW-IMAGE?type=REACTION&object=RXN-18328

Further than that hard to say

El Crazy Xabi Thanks a lot for the info!