What is term HC1?

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Is HC1? Refer to hydrochloric acid or hydrogen chloride gass?, i cannot understand this section on secret of Methamphetamine manufacture by uncle fester chapter 5

 

[HIGGS BOSSON]

It is a typo in the text, means HCl (hydrochloric acid)

 

[Curiousonion]

Hvl
HcL gas

 

[Remove]

Ok, thanks for the answer