Thiodiglycol (INN), classified at 2930700000, is a bifunctional thioether diol with legitimate commercial uses as a textile dye solvent, a lubricant additive, and a chemical intermediate for polyesters and surfactants. It is also a direct hydrolysis product of sulfur mustard (a CWC Schedule 2 chemical), which places it on international watch lists and subjects imports to Commerce Department dual-use scrutiny under the Export Administration Regulations. Despite its industrial utility, importers should expect heightened customs examination and should prepare end-use certificates and consignee documentation as a matter of routine practice.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Thiodiglycol is listed under CWC Schedule 2 because it is both a precursor to and a breakdown product of sulfur mustard (HD). The CWC does not restrict legitimate commercial use, but it requires national authorities to monitor production, import, and export. In the US, BIS administers these controls, and importers may need to file end-use statements even for textile or lubricant applications.
Yes — thiodiglycol (bis(2-hydroxyethyl) sulfide) has a dedicated heading at 293070 (single line 2930700000). References to thiodiglycol appearing in the description of line 2930909208 under heading 293090 reflect a different, combined provision covering multiple compounds; if the imported product is pure thiodiglycol, heading 293070 takes precedence as the more specific provision.
Subheading 7 of 8 in heading 2930
Trade Directory
List your company under HS 293070 — Thiodiglycol (Bis(2-hydroxyethyl) Sulfide), so the companies trading it can find you. Be the first supplier listed.
ImportsExports
Imports
—YoY · free account
Exports
—YoY · free account
Low of 5 reported months · imports
Low · free accountFewer than 6 of the last 12 months reported trade, or the latest month was under $500K; the trend chart is not shown for thin series.
Through August 2026 · imports 5 of 12 months reported, exports 3 of 12 months reported. Source: U.S. Census Bureau.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share |
|---|---|---|---|---|
| 2930700000 | Bis(2-Hydroxyethyl)Sulfide (Thiodiglycol (Inn)) | — | -- | -- |
Imports · August 2026
origin
customs district
destination
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rate provision · imports
None recorded for this period.