碳酰氯 Traditional form: 碳酰氯 Pinyin (reading): tànxiānlü Definitions: carbonyl chloride COCl2 phosgene, a poisonous gas Characters: 碳 - carbon 酰 - acylate 氯 - chlorine Traditional characters: 碳 - carbon 酰 - acylate 氯 - chlorine