El conocimiento científico Física y química 3º E.S.O. FIRST TERM UNIDAD 0: El conocimiento científico http://scitechie.com/01/where-you-stand-in-this-universe/
CHEMICAL HAZARD LABEL
CHEMICAL HAZARD LABEL http://www.conceptdraw.com/How-To-Guide/hazard-pictograms
PICTOGRAMS
R and S phrases
R and S phrases Hazard classification should be indicated with hazard signs and hazard symbols and/or R phrases as well as S phrases. R phrase and R number: phrases indicating the risks of hazardous preparations and substances, and their numbers respectively. S phrase and S number: phrases related to the safe handling of hazardous preparations, and their numbers respectively. Risk Phrases (R) and Safety Phrases (S) also occur in combinations (combined R and S phrases). http://www.msds-europe.com/id-485-r_s_phrases.html