Octamethylcyclotetrasiloxane (CAS 556-67-2): import duty, licences and trade rules in India
Octamethylcyclotetrasiloxane is a cyclosiloxane that is the octamethyl derivative of cyclotetrasiloxane. For trade in India: OK to trade, but watch: global treaties & export markets. Import duty is about 27.73% (tariff item 2934 (estimate)).
Checked 2026-10-31 against official Indian and international lists. Sources are given under each answer.
Key facts
| CAS number | 556-67-2 |
|---|---|
| Formula | C8H24O4Si4 |
| Also called | Cyclotetrasiloxane, octamethyl-, 2,2,4,4,6,6,8,8-Octamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane, Oktamethylcyklotetrasiloxan, OMCTS |
| Tariff item (HS) | 2934 (estimate) |
| Total import duty | about 27.73% |
| Anti-dumping duty (most producers) | None found |
| SCOMET (export control) | Not listed |
| NDPS / precursor | Not listed |
Every answer, with its source
Rules in IndiaOK
- Not on the Indian banned-pesticide, drug-precursor, narcotic, psychotropic or new-drug lists we check.
- Normal factory, storage and GST rules still apply.
Exporting from IndiaOK
- Not on the SCOMET export-control list or the precursor export list.
- The buyer’s country may still have its own import rules.
Global treaties & export marketsCHECK
- Not listed by the Stockholm Convention (persistent pollutants), the Rotterdam Convention (prior consent before export) or the Montreal Protocol (ozone layer).
- On the EU REACH Candidate List of substances of very high concern (pbt; vpvb), since 27-Jun-2018. EU buyers must pass on safety information for articles containing more than 0.1%, and it may later need an authorisation.
- Restricted under EU REACH Annex XVII: some uses, products or concentrations are banned in the EU; check the restriction entry for your product.
- Registered under EU REACH, so EU importers can buy it under an existing registration.
- Active on the US TSCA Inventory, so it can be imported into the US without a new-chemical notice.
- US TSCA: subject to a TSCA section 4 test rule.
- Listed on the Australian Inventory of Industrial Chemicals (AICIS), so it can be introduced into Australia as an existing industrial chemical.
- EU: harmonised classification (CLP Annex VI, index 014-018-00-1): Repr. 2, Aquatic Chronic 1. Suppliers in the EU must label it this way.
Import dutyOK
- About ₹27,730 duty on every ₹1,00,000 of import value (CIF).
- No tariff line names this chemical, so we worked out its likely heading from its structure: 2934, nucleic acids and other heterocyclic compounds (ring containing O and Si).
- All lines under heading 2934 pay basic customs duty 7.5%; with social welfare surcharge and IGST 18% that makes about 27.73%.
- Confirm the exact 8-digit code with your customs broker before you import.
SafetyCHECK
- Catches fire easily
- Can cause long-term health damage
- Flammable liquid and vapor
- Suspected of damaging fertility or the unborn child
- May cause long lasting harmful effects to aquatic life
- Always read the supplier’s safety data sheet (SDS) before handling.
Storage, transport & PESOOK
- Flash point about 55.5 °C (Hazardous Substances Data Bank (HSDB)).
- It is not a hydrocarbon, so the Petroleum Rules do not class it; storage still follows the state fire service’s rules and the factory licence.
Price and suppliersNO DATA
- Post a requirement and we will find suppliers for you.
Questions about Octamethylcyclotetrasiloxane
What is the import duty on Octamethylcyclotetrasiloxane in India?
The total import duty on Octamethylcyclotetrasiloxane is about 27.73% of the import value under tariff item 2934 (estimate), including basic customs duty, the social welfare surcharge and IGST. Check the latest notifications before you import.
Is there anti-dumping duty on Octamethylcyclotetrasiloxane?
No anti-dumping duty on Octamethylcyclotetrasiloxane was found in the Customs (ADD) notifications in force.
What is the HS code (tariff item) of Octamethylcyclotetrasiloxane in India?
Octamethylcyclotetrasiloxane falls under tariff item 2934 (estimate) of the Customs Tariff of India.
Is Octamethylcyclotetrasiloxane restricted or licensed in India?
No special Indian ban or licence found. Not on the Indian banned-pesticide, drug-precursor, narcotic, psychotropic or new-drug lists we check. Normal factory, storage and GST rules still apply.
Does exporting Octamethylcyclotetrasiloxane from India need a licence?
No export licence needed. Not on the SCOMET export-control list or the precursor export list.
Is Octamethylcyclotetrasiloxane hazardous?
Hazardous: take normal precautions. Catches fire easily. Can cause long-term health damage. Flammable liquid and vapor.
Is Octamethylcyclotetrasiloxane regulated under global treaties or in the EU and US?
EU: substance of very high concern. Not listed by the Stockholm Convention (persistent pollutants), the Rotterdam Convention (prior consent before export) or the Montreal Protocol (ozone layer). On the EU REACH Candidate List of substances of very high concern (pbt; vpvb), since 27-Jun-2018. EU buyers must pass on safety information for articles containing more than 0.1%, and it may later need an authorisation.
Related chemicals
Guidance from official lists, not legal advice. Rules change; confirm with DGFT, customs or the regulator before you trade.