... 2)Place of Origin: China Detailed Product Description china organic chemical products methylenechloride 1) Standard: GB4117-20082)Place of ... produce ampicillin trihydrate, carbenicillin, cephalothin, etc.Storage:Methylene chloride1) Store in a cool, well - ventilated area2) stock temperature≤ ... of the simple chlorohydrocarbons, but it is not without health risks, as its high volatility makes it an acute ...