QA number：14519
QI need further information about solution and solubility.
A
The amendment (2+1) in the product name "hydrochloric acid (2 + 1)" or rather (a+b) in JIS "reagent (a + b)" means that the preparation method is "200 ml of hydrochloric acid (JIS K 8180) (35.0 to 37.0%) + 100 ml of water".
For other notations please refer to the following. (From JIS K 8001) For further documentations, please pay attention to the following. (From JIS K 8001)