Antimony Trisulfide R+P AT-70
Sb2S3 · CAS 1345-04-6 · M.W. 339.7 g/mol
R+P AT-70 is a highly specialized antimony trisulfide grade in full compliance with US MIL-SPEC requirements for military ammunition and pyrotechnics. Thanks to its very high density it delivers significantly more energy per unit volume than conventional antimony trisulfide and is therefore suitable for explosives, military and safety-critical ammunition. Manufactured in a proprietary process with a particularly low impurity profile.
Available as fine black powder in 325 mesh 45 µm, 1.6–1.8 g/cc for brake linings and tribology, as high-density powder for explosives 2.4–2.6 g/cc, as granules customized 70–200 mesh per MIL-SPEC and as lumps 0.5–3 inch.
| Form | Dry black powder, silver-grey lumps |
|---|---|
| Sb | min. 71 % w/w |
| Sulfur | min. 26 % w/w |
| Solubility | Insoluble in water, soluble in conc. HCl |
| Insoluble fraction | max. 0.5 % in conc. HCl |
| Acidity | max. 0.02 % as H2SO4 |
| Free sulfur | max. 0.2 % MIL-SPEC Type I, max. 0.02 % MIL-SPEC Type II |
| Moisture | max. 0.2 % |
| Fe, Pb, As | < 0.2 % total |
| Bulk density | 2.3 +/- 0.1 g/cc ammunition grade, 1.7 +/- 0.1 g/cc tribology grade |
| Particle size | 325 mesh 45 µm: 95 % pass-through, 100 mesh 150 µm: 100 % pass-through, granules per MIL-SPEC |