Gold

Location:  Group 11, Period 6
Atomic Weight:  196.9665
Coordination Number:  6
Chemical Form in Solution:  Au(Cl)₆^3-

Storage & Handling:  Keep tightly sealed when not in use. Store and use at 20 ± 4°C. Do not pipet from container. Do not return portions removed for pipetting to container.

Chemical Compatibility:  Stable in HCl, and HNO₃, as the chloride complex. Avoid basic media. Stable with most metals and inorganic anions in acidic media.

Stability:  2-100 ppb levels. 2-10 ppb Au is stable for ≤ 1 day maximum in 1% HNO₃ / LDPE container. 100 ppb is stable for ≤ 2 days maximum in 1% HNO₃ / LDPE container. 1-10,000 ppm solutions chemically stable for years in 10% HCl / LDPE container.

Au Containing Samples (Preparation & Solution):  Metal (aqua regia); Oxides (soluble in HCl); Ores (dissolve in HCl / HNO₃).