Product Short Description: METOL For PhotoARaphic Purpose 4-Methylaminophenol Sulphate Product Description: The Environmental Working Group (EWG) lists methylparaben as being a low to moderate health hazard. However, the hazard is only in regards to allergic reactions or product usage exceeding the recommended level. The EWG lists methylparaben's risk of causing cancer and reproductive toxicity at 0 percent. The Environmental Working Group (EWG) lists methylparaben as being a low to moderate health hazard. However, the hazard is only in regards to allergic reactions or product usage exceeding the recommended level. The EWG lists methylparaben's risk of causing cancer and reproductive toxicity at 0 percent. The Environmental Working Group (EWG) lists methylparaben as being a low to moderate health hazard. However, the hazard is only in regards to allergic reactions or product usage exceeding the recommended level. The EWG lists methylparaben's risk of causing cancer and reproductive toxicity at 0 percent.