Tetrachloroauric (III) Acid
Physical–chemical parameters of Tetrachloroauric (III) Acid shall meet the requirements specified in Table 1.
Table 1
| Parameter | Value |
| 1 Mass fraction of gold, % | 6,0-25,0 |
| 2 Mass fraction of impurities, %, not more than | |
| copper | 0.003 |
| silver | 0.003 |
| platinum | 0.001 |
| lead | 0.001 |
| palladium | 0.002 |
| sodium, potassium, calcium, magnesium (the total mass fraction) | 0.02 |
| 3 Content of free hydrochloric acid*, g/dm3 | 90-300 |
*The parameter is determined by the results of titration of tetrachloroauric (III) acid solution with an alkali solution to a pH-value of 7 (pH=7) | |