求翻译：用作醛类、酮类和酰氯类的还原剂，也用作分析化学及造纸工业含汞污水的处理上。是什么意思？

As aldehydes, ketones, and chloride reducing agent, also used for the analysis of the chemical and paper industries of mercury-containing sewage treatment.

As such, aldehydes and ketones such as thionyl chloride is also used as reductant, analytical chemistry and paper industries with mercury on wastewater treatment.

Serves as the aldehyde class, the ketones and the acid radical chlorine class reducing agent, also serves as the analytical chemistry and the paper industry contains in mercury sewage processing.

Used to aldehydes, ketones and chloride reduction agent, also used for analysis on mercury-containing waste water treatment of chemical and paper industry.

Appearance: colourless crystals or white powder. Hygroscopicity. Density of 2.33. At 180 ° c losing two molecular crystal water, 300 c lose all their water of crystallization. Nature and sodium pyrophosphate similar, but larger solubility. Soluble in water, insoluble in ethanol