Indium

Location:  Group 13, Period 5
Atomic Weight:  114.82
Coordination Number:  6
Chemical Form in Solution:  In(H₂O)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:  Soluble in HCl, HNO₃, and H₂SO₄. Avoid neutral and basic media. Stable with most metals and inorganic anions. The oxalate, sulfide, carbonate, hydroxide, and phosphate are insoluble in water.

Stability:  2-100 ppb levels stable for months in 1% HNO₃ / LDPE container. 1-10,000 ppm solutions chemically stable for years in 2-5% HNO₃ / LDPE container.

In Containing Samples (Preparation & Solution):  Metal (is best dissolved in HCl / HNO₃); Oxide (soluble in mineral acids); Ores (carbonate fusion in Pt⁰ followed by HCl dissolution); Organic Matrices (Sulphuric / peroxide digestion or dry ash and dissolution in dilute HCl).