Technical sulfur produced in Turkmenistan to state standard TDS 1017-2017 in five purity grades, from 9998 at 99.98% sulfur down to 9920 at 99.20%. The grade sets the permitted ash, organic matter, acidity and moisture; the physical form — granular, lump or liquid — is specified separately when ordering.
Specification
- Grades: 9998, 9995, 9990, 9950 and 9920
- Standard: TDS 1017-2017, technical sulfur
- Mass fraction of sulfur: 99.98% down to 99.20% by grade
- Forms: granular, lump or liquid
- Lump size for export: not exceeding 200 mm
- Mechanical impurities (paper, wood, sand): not permitted, all grades
Physical and chemical indicators
Technical sulfur — TDS 1017-2017
| Parameter | 9998 | 9995 | 9990 | 9950 | 9920 |
|---|
| Mass fraction of sulfur, %, min | 99.98 | 99.95 | 99.90 | 99.50 | 99.20 |
| Ash content, %, max | 0.02 | 0.03 | 0.05 | 0.2 | 0.4 |
| Mass fraction of organic matter, %, max | 0.01 | 0.03 | 0.06 | 0.25 | 0.5 |
| Acidity as sulfuric acid, %, max | 0.0015 | 0.003 | 0.004 | 0.01 | 0.02 |
| Mass fraction of arsenic, %, max | 0.0000 | 0.0000 | 0.000 | 0.000 | 0.03 |
| Mass fraction of selenium, %, max | 0.000 | 0.000 | 0.000 | 0.000 | 0.04 |
| Mass fraction of water, %, max | 0.2 | 0.2 | 0.2 | 0.2 | 1.0 |
| Mechanical impurities (paper, wood, sand) | Not permitted | Not permitted | Not permitted | Not permitted | Not permitted |
Indicators 1–6 are calculated on a dry basis. For liquid sulfur of grade 9998 the ash content shall not exceed 0.008%, and 0.01% for grades 9995 and 9990. Lump size for export shall not exceed 200 mm.
Choosing a grade
Grades 9998 and 9995 are the high-purity grades, specified where ash and organic residue matter to the downstream process. Grade 9990 is the general industrial grade. Grades 9950 and 9920 are bulk consumption grades: 9920 in particular carries materially higher permitted ash, organic matter, arsenic, selenium and moisture, and is specified where the sulfur is burned or converted rather than used as a finished material.
Applications
Sulfuric acid production, phosphate and compound fertiliser manufacture, rubber vulcanisation, synthetic fibre production, pulp and paper, and mining and metallurgical leaching.
Related
Loading and delivery
FCA producing plant, or FOB Türkmenbašy International Sea Port. Bulk, 1,000 kg big bags or containerised. Rail dispatch available for overland destinations.
