formalin 3

[reefD]

anyone know if this stuff keeps well ? ya know shelf life. i have a bottle thats at least three years old. think its degraded? i cant find any exp. or shelf date

 

[shan820]

Formalin is relatively stable, and this product is only 3% formalin. Do you know what it is diluted with? This link says Formalin 3 is stable indefinately, I'd say its still fine. http://www.novalek.com/kpd54.htm