dibutyltin dichloride (CAS 683-18-1) — Safety Data Sheet

For dibutyltin dichloride (CAS 683-18-1) the documentation obligation begins before the first shipment. This page sets out what the safety data sheet has to establish.

dibutyltin dichloride (CAS 683-18-1) at a glance

• Substance – dibutyltin dichloride
• CAS number – 683-18-1
• EC number – 211-670-0
• CLP Annex VI index number – 050-022-00-X
• Also known as – (DBTC)
• Hazard statements – H341 (suspected of causing genetic defects); H360FD (may damage fertility and the unborn child); H330 (fatal if inhaled); H312 (harmful in contact with skin); H301 (toxic if swallowed); H372 (causes damage to organs through prolonged or repeated exposure)
• Hazard classes – Muta. 2, Repr. 1B, Acute Tox. 2 *, Acute Tox. 4 *, Acute Tox. 3 *, STOT RE 1
• Label pictograms – GHS05, GHS06, GHS08, GHS09
• Signal word – Danger
• Concentration limits / M-factor / ATE – Skin Corr. 1B;H314: C ≥ 5.0%;Skin Irrit. 2;H315: 0.01% ≤ C < 5.0%;Eye Dam. 1;H318: 3.0% ≤ C < 5.0%;Eye Irrit. 2;H319: 0.01% ≤ C < 3.0%;M = 10
• Entry current as of – ATP01
• CMR classification – yes, classified as carcinogenic, mutagenic or toxic for reproduction
• Documentation issued – safety data sheet in REACH Annex II structure; working draft or signed card
• What is supplied – a document. MolGod.org does not sell, supply or ship chemical substances.

Purity, certificates and what the sheet does not say

A laboratory receiving dibutyltin dichloride from its supplier must ensure that two documents agree: the substance’s safety data sheet and the batch certificate for the material in hand. Discrepancies in identity or supplier details between these documents render both questionable. MolGod facilitates the preparation and audit of these documents, while the material itself is sourced from your supplier.

Aquatic hazard and disposal

Aquatic hazard classification (H400, H410) for CAS 683-18-1 reaches beyond the label. It governs the environmental section of the safety data sheet, the disposal route stated in section 13, and in several Member States the reporting threshold for storage. Consignments carrying an aquatic hazard also attract marine pollutant marking when moved by sea.

Which GHS pictograms apply to dibutyltin dichloride?

The label for dibutyltin dichloride carries GHS05 (corrosion), GHS06 (skull and crossbones), GHS08 (health hazard), GHS09 (environment), with the signal word Danger. These are not chosen by the supplier: CLP Annex VI states them for CAS 683-18-1, and the precedence rules in Annex I decide which pictogram is dropped when two would say the same thing. A label showing a different set from the register is wrong even if every hazard statement on it is correct.

Identifiers that must agree

Three identifiers travel with this substance and all three have to agree: CAS 683-18-1, the Annex VI index number 050-022-00-X, and the name as it appears in the register. Mismatched identifiers are the quietest defect in a documentation set, because every individual document looks correct and only a cross-check reveals that they describe different things.

What is the EC number for dibutyltin dichloride?

Alongside CAS 683-18-1, this substance carries EC number 211-670-0 and Annex VI index 050-022-00-X. European documentation is built around the EC number as often as around the CAS: registration dossiers, the candidate list and customs systems key on it. A safety data sheet quoting only one of the two forces every downstream reader to look up the other.

What is the CLP classification of dibutyltin dichloride?

The harmonised classification for CAS 683-18-1 carries 9 hazard statements: H341, H360FD, H330, H312, H301, H372, H314, H400, H410. In plain terms this means suspected of causing genetic defects; may damage fertility and the unborn child; fatal if inhaled; harmful in contact with skin. A harmonised entry is binding across the Union — an importer may not soften it, and a self-classification that diverges from it will not survive an enforcement check.

What do customs check when importing dibutyltin dichloride?

When a consignment of dibutyltin dichloride is stopped at the border, the document examined first is rarely the invoice. It is section 14 of the safety data sheet and its agreement with the transport papers. A missing packing group, an absent UN number or a proper shipping name that contradicts the classification of CAS 683-18-1 will hold the pallet regardless of how complete the remaining fifteen sections are.

What concentration limits apply to dibutyltin dichloride?

The harmonised entry for dibutyltin dichloride carries specific concentration limits: H314: C ≥ 5 %; H315: 0,01 % ≤ C < 5 %; H318: 3 % ≤ C< 5 %; H319: 0,01 % ≤ C < 3 %. These override the generic cut-off values, so a mixture containing dibutyltin dichloride is classified against these figures and not against the default thresholds. M-factor on record: 10. The M-factor multiplies the contribution of this substance in the aquatic hazard calculation for a mixture, which is where it is most often overlooked.

How is dibutyltin dichloride classified for road, sea and air transport?

Transport classification for dibutyltin dichloride sits in section 14 and differs by mode: ADR for road, IMDG for sea, IATA for air. A sheet that prints all three without stating which applies leaves the shipper to choose, and the shipper is the one penalised for choosing wrong.

How do I check if my SDS for dibutyltin dichloride is still valid?

Prior to requesting documentation for dibutyltin dichloride, confirm whether the existing sheet is capable of undergoing an inspection. Perform a section-by-section evaluation against Annex II to assess compliance in a single pass; if it fulfils the requirements, the honest assessment will validate its validity.

Is dibutyltin dichloride classified as a CMR substance?

CAS 683-18-1 is classified as a CMR substance (H360FD). That status changes the obligations attached to every shipment: workplace exposure documentation, restrictions on supply to the general public, and substitution pressure from downstream users who must justify continued use. A safety data sheet for a CMR substance is read more closely than any other, because the classification itself invites scrutiny.

What Annex VI notes and concentration limits apply to dibutyltin dichloride?

The register also records Skin Corr. 1B;H314: C ≥ 5.0%;Skin Irrit. 2;H315: 0.01% ≤ C < 5.0%;Eye Dam. 1;H318: 3.0% ≤ C < 5.0%;Eye Irrit. 2;H319: 0.01% ≤ C < 3.0%;M = 10 for this entry. Specific concentration limits, M-factors and acute toxicity estimates override the generic cut-off values, so a mixture calculation that ignores them will classify the mixture wrongly in both directions.

Why a correct sheet stops being correct

Classification under CLP moves with each Adaptation to Technical Progress. A sheet for CAS 683-18-1 written before the amendment that touched its entry keeps stating a classification the register no longer holds. Nothing in the document announces this — it reads exactly as it did on the day it was issued, which is precisely why revision dates are checked before content.

Disposal route and waste classification

Disposal of dibutyltin dichloride and of its packaging is section 13, and it has to align with the classification: a substance with an aquatic hazard cannot be routed to drain, and the waste code assigned by the holder follows from the hazard profile, not from convenience.

Which SDS sections decide whether a shipment clears?

A sheet for CAS 683-18-1 must be read numerically rather than narratively; subsections carry equal weight as sections: an inspector seeking information under point 3.1 will not accept data folded into a paragraph elsewhere, irrespective of that paragraph’s completeness. Completeness is assessed initially by structure, then by content.

Target organ toxicity in the sheet

Specific target organ toxicity (H372) obliges the sheet to state the route of exposure and, where established, the organ affected. This is one of the few places where a generic phrase is treated as a defect rather than as caution: an unspecified organ leaves the downstream user unable to build an exposure scenario.

What must the label for dibutyltin dichloride contain?

The supply label for dibutyltin dichloride is generated from the same classification that drives the safety data sheet: pictograms selected by precedence, one signal word derived from the highest hazard class present, and the hazard statements H341, H360FD, H330… reproduced in full. Where the container is too small to carry the complete set at a legible size, there are lawful ways to handle it and unlawful ones that look identical to a non-specialist.

Is dibutyltin dichloride on the SVHC candidate list?

Yes — dibutyltin dichloride appears on the candidate list of substances of very high concern. That triggers duties that classification alone does not: notification to ECHA above the tonnage threshold, and an obligation to inform recipients where the substance is present in an article above 0.1 % by weight.

Questions about documentation for dibutyltin dichloride

Is dibutyltin dichloride a CMR substance?

Yes. The harmonised classification places it among substances classified as carcinogenic, mutagenic or toxic for reproduction, which changes workplace documentation and supply restrictions.

What hazard statements apply to CAS 683-18-1?

The harmonised entry lists H341, H360FD, H330, H312. These are binding across the Union and may not be softened by a self-classification.

In which language must the sheet be supplied?

In an official language of each Member State where dibutyltin dichloride is placed on the market, unless that State has stated otherwise.

Can I check whether my existing sheet is still valid?

Yes. A section-by-section reading against Annex II and the current harmonised entry establishes that in one pass, and a sheet that passes is reported as passing.

MolGod.org issues documentation and does not sell, supply or ship chemical substances. CAS 683-18-1 identifies the subject of this document.