What is the tonnage threshold for REACH on sodium sulfate (glauber's salt)?

Registration required for any importer or manufacturer placing >1 t/year on the EU market

CAS 7757-82-6 · REACH · European Union

Sodium sulfate (Glauber's salt) under REACH

Na2SO4 · 硫酸钠

Status: Registered. Sodium sulfate is fully registered under REACH at the highest tonnage band (>1,000,000 tonnes/year). **Distinguishing pattern: Two production routes (natural sodium sulfate from mirabilite mining and saline-lake brine evaporation, especially Chinese saline lakes in Sichuan plus Inner Mongolia plus Qinghai plus Xinjiang; and synthetic sodium sulfate as by-product of rayon / viscose process plus Mannheim sulfate process plus KCl + H2SO4 process plus various chemical industry brine-acid neutralisation streams) + Glauber's salt is the decahydrate Na2SO4.10H2O (CAS 7727-73-3) historically named after Johann Glauber 1625 + pulp / paper Kraft chemical recovery (~30% of consumption) plus detergent filler / extender (~25%) plus glass batch (~15%) plus textile dyeing (~10%) plus tanning plus laxative plus heat-storage downstream chains + low hazard profile (NOT classified as hazardous under CLP at industrial-grade purity beyond inhalable / respirable particulate dust).** No harmonised CLP entry for sodium sulfate; ECHA C&L Inventory aggregates notifier classifications: NOT typically classified as hazardous (verify against ECHA https://echa.europa.eu/information-on-chemicals before relying). NOT SVHC. NOT Annex XIV. NO active EU AD case on Chinese-origin sodium sulfate currently (verify against EUR-Lex https://eur-lex.europa.eu/ before invoicing).

Sodium sulfate is fully REACH-registered with **low hazard profile** (NOT typically classified as hazardous beyond respirable-dust handling). NOT SVHC, NOT Annex XIV. NO active EU AD. **Two production routes (natural mirabilite + saline-lake brine; synthetic rayon / Mannheim / KCl-H2SO4 by-product)**. **Pulp / paper Kraft chemical recovery + detergent + glass + textile dyeing + tanning + laxative + heat-storage** downstream chains. Major Chinese producers concentrated in Sichuan + Inner Mongolia + Qinghai + Xinjiang saline-lake belts.

Listing and threshold

Substance	Sodium sulfate (Glauber's salt) (CAS 7757-82-6), Na2SO4
Regime	EU Regulation (EC) No 1907/2006: Registration, Evaluation, Authorisation and Restriction of Chemicals
Jurisdiction	European Union (EU-27 plus EEA: Iceland, Liechtenstein, Norway)
Status	Registered
Tonnage threshold	Registration required for any importer or manufacturer placing >1 t/year on the EU market

Classifications under this regime

No harmonised CLP entry for sodium sulfate; notifier classification (per ECHA C&L Inventory): NOT typically classified as hazardous at industrial-grade purity (verify against ECHA C&L Inventory before relying)
IARC: Not classified
NOT subject to Drug Precursors or Explosives Precursors scheduling
ADR / RID transport classification: NOT regulated
**EU Pharmacopoeia monograph** for pharma-grade sodium sulfate / Glauber's salt laxative use (verify monograph reference against EDQM / Ph. Eur. before relying)
Inhalable / respirable particulate dust workplace exposure considerations apply (verify against ECHA REACH registration dossier and national OEL lists before relying)

Restrictions and conditions of use

NOT on REACH Annex XIV (verify against ECHA https://echa.europa.eu/authorisation-list)
NOT classified as SVHC (verify against ECHA https://echa.europa.eu/candidate-list-table)
NOT subject to any Annex XVII restriction
NO active EU AD case on Chinese-origin sodium sulfate currently (verify against EUR-Lex https://eur-lex.europa.eu/ before invoicing)
NOT in CBAM Phase 1 scope

Importer obligations

A non-EU producer cannot register directly under REACH. The EU importer of record must hold a registration or rely on an Only Representative (OR). Major Chinese sodium sulfate producers concentrated in saline-lake belts (verify each producer-site pair against the producer's public website before relying on a specific plant): Sichuan Hongya Qingyijiang natural sodium sulfate, Inner Mongolia Lanyu Petroleum Chemical natural sodium sulfate, Qinghai Saline Lake Industry natural sodium sulfate, Xinjiang Eight One natural sodium sulfate, Jiangsu Sailboat Chemical synthetic sodium sulfate (rayon by-product).

Required documents

REACH registration number on EU side
SDS (low hazard profile, with respirable dust handling notes)
Customs entry HS code 283311 (anhydrous sodium sulfate) or 283319 (other sodium sulfates including Glauber's salt)
No ADR documentation required
Pharma-grade Ph. Eur. certification where applicable

Common compliance traps

The pitfalls that have bitten importers on this lane in the past. None of these is theoretical.

**Two production routes: natural (mirabilite + saline-lake brine, China-dominant) and synthetic (rayon by-product, Mannheim sulfate, KCl + H2SO4 by-product, brine acid-soda by-product)**
Glauber's salt = decahydrate Na2SO4.10H2O (CAS 7727-73-3)
NOT SVHC, NOT Annex XIV, NO active EU AD
**Pulp / paper Kraft chemical recovery ~30% + detergent filler ~25% + glass ~15% + textile dyeing ~10% + tanning + laxative + heat-storage downstream chains**
Major Chinese producers concentrated in Sichuan + Inner Mongolia + Qinghai + Xinjiang saline-lake belts

Where to read next

For substance-level identifiers (formula, molecular weight, SMILES, InChIKey), GHS hazard profile, IMDG transport class, and full sourcing reference for sodium sulfate (glauber's salt), see the CAS 7757-82-6 sourcing reference.

For grade-by-grade buying notes, freight maths, supplier-tier pricing, and a worked landed-cost example, the sodium sulfate (glauber's salt) cornerstone hub covers the full sourcing chain.

For the structure and history of REACH, see the REACH glossary entry.

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Cross-jurisdiction profile and sourcing references

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