SCOMET Category 1 - Toxic Chemicals and CWC Schedule Controls

Published: March 5, 2026 | By: TariffWolf Team

SCOMET Category 1 is the most relevant category for India’s massive chemical and pharmaceutical industry. It controls toxic chemicals, precursors, and related equipment aligned with the Chemical Weapons Convention (CWC). With India being one of the world’s largest chemical producers and exporters, understanding Category 1 is essential for thousands of companies.

How CWC Schedules Map to SCOMET Category 1

The Chemical Weapons Convention organises controlled chemicals into three schedules based on their risk of being used as chemical weapons. SCOMET Category 1 mirrors this structure:

CWC Schedule	SCOMET Sub-Category	Risk Level	Description
Schedule 1	1A	Highest	Chemicals with few or no uses outside weapons - nerve agents, mustard gas, etc.
Schedule 2	1B	High	Chemicals that are precursors to Schedule 1 chemicals or have limited commercial use
Schedule 3	1C	Moderate	Chemicals widely used commercially but also usable in weapons production
Non-scheduled	1D	Lower	Additional chemicals of proliferation concern not in CWC schedules

The Critical Role of CAS Numbers

Every chemical in Category 1 is identified by its CAS (Chemical Abstracts Service) number - a unique numerical identifier assigned to every chemical substance. When classifying your export, you must match the CAS number, not just the common name.

This is important because many chemicals have multiple common names, trade names, and abbreviations. The CAS number is the only unambiguous identifier. For example, Thiodiglycol can also be called bis(2-hydroxyethyl) sulfide, but its CAS number 111-48-8 is unique and unmistakable.

Example Category 1 Chemicals

Chemical Name	CAS Number	Schedule	Commercial Use
Thiodiglycol	111-48-8	Schedule 2	Textile dyeing, solvent
Phosphorus trichloride	7719-12-2	Schedule 3	Pesticide manufacturing
Hydrogen fluoride	7664-39-3	Schedule 2	Petroleum refining, glass etching
Triethanolamine	102-71-6	Schedule 3	Cosmetics, cement grinding

Threshold Quantities and Exemptions

Some Category 1 chemicals are controlled only above specific quantities. Others require authorisation for any quantity. The key rules are:

• Schedule 1 chemicals - controlled for any quantity. Even milligrams require authorisation for export.
• Schedule 2 and 3 chemicals - may have threshold quantities below which export to certain countries is permitted without authorisation (under specific DGFT notifications).
• Mixtures - a mixture containing a CWC-scheduled chemical may be controlled if the concentration exceeds specified thresholds.

Indian chemical companies must also be aware of DGFT Notification No. 29/2015-20 and its amendments, which provide specific exemptions for certain Schedule 2 and 3 chemicals exported to CWC member states.

Equipment Controls Under Category 1

Category 1 does not only cover chemicals - it also controls equipment that can be used to produce, process, or disseminate toxic chemicals. This includes certain types of reaction vessels, storage tanks, heat exchangers, and chemical detection equipment with specifications that make them suitable for CW agent production.

Compliance for Indian Chemical Exporters

1. Maintain an updated CAS number database for all chemicals you export.
2. Cross-check every export against Category 1 entries using CAS numbers, not common names.
3. Check destination country - CWC member states may qualify for simplified procedures; non-member states face stricter controls.
4. Keep records - retain all export documentation including EUCs, purchase orders, and shipping bills for at least 5 years.
5. Train your sales team - sales representatives dealing with international customers must understand the basics of CWC scheduling.

Not sure if your chemical is on the SCOMET list? Enter the chemical name or CAS number in the SCOMET AI Assistance chatbot for instant classification guidance.

Disclaimer: This article is for informational purposes only. Chemical export controls involve complex legal and technical considerations - always verify classifications with DGFT and consult the latest DGFT notifications.

SCOMET Category 1 CWC Chemicals CAS Number