this bodywash had
4% sles+capb at 4:1 ratio
0.1% tetrasodium edta
after production of a particular batch they forgot to wash this hoper. after 3 days when we saw it, this brown dots was on it. no bad smell or anything ealse. the hoper was in open space and in contact with air.
are these dots some oxidation or something else from hoper materials or it is some kind of microbial contamination?