The composition of silica sol is amorphous silica particles, water and trace stabilizer (such as Na+, K+, NH4+). Silica sol is not listed as harmful chemicals, does not belong to dangerous chemicals, but it has a mild irritation (alkaline like soap water, acid like vinegar).
When using silica sol, wear protective gloves and goggles, and clean the contact part with a large amount of water when skin contact; In case of eye contact, flush with plenty of water, and seek medical attention if symptoms do not relieve.