E512AntioxidantLow concern
Stannous Chloride
In plain words
The short version
A tin salt used as an antioxidant to keep canned white asparagus and similar pale vegetables from discolouring.
Why it's green
It's widely considered safe at the amounts used in food, so we mark it green. The Safety section below has the details.
01Origin
Where it comes from
Tin(II) chloride, made from tin and hydrochloric acid.
02Usage
How it's used
Antioxidant and colour-retention agent — its main food use is keeping canned white asparagus (and some other pale canned vegetables) from discolouring.
03Safety
Safety profile
ADI 2 mg/kg body weight as tin (JECFA). Used at low levels; excess tin can cause gastrointestinal upset.
04Properties
Physical & chemical properties
White crystals, water-soluble, a strong reducing agent (mops up oxygen).
05Regulation
Regulation worldwide
EU-permitted with limits (mainly canned white asparagus); varies elsewhere.
Educational information only. Not medical or dietary advice.