HiMedia GRM1420-500G Sodium Thiosulphate Anhydrous, A.R., 500 g

Worked well for the task of cleaning some stains on gold but it’s important to remove all of it before it dries in crevices. A little goes a loooooong way.

I'm retired from the fish health and aquaculture industry and used this stuff for years at work. I wanted to neutralize the chlorine in my hair and suit after swimming laps but still use my regular shampoo. This is the ingredient in the pricey dechlor shampoos that does that and it's a many year supply. Just one large pinch in 1 cup water in my sprayer. I spray my hair, suit, goggles, etc. down after rinsing off.

I didn’t test the purity but if you are doing home and middle school labs, this is your huckleberry. The price is great for teachers using their own money to create meaningful labs and create engagement for students.

I purchased this to reduce chlorine level in a spa after accidently overdosing with chlorine. A very small amount is all that is required to knock out excessive chlorine levels. Works great. With the small amount it required, this size will last a very long time.

Exactly what's needed for sts, great price!

the products were amazing Amazon let me down!

Does the work was advertised for