313c implies that Though not listed by name and CAS number, this chemical is reportable under a number of of the EPCRA section 313 chemical classes. This is a crystalline salt which has no colour and is highly toxic and soluble in water. It's got the odor of bitter almonds https://martindwhlc.tinyblogging.com/5-simple-statements-about-potassium-cyanide-what-is-it-explained-73303607