DMF SDS Authoring Under CLP: Section 14 and EUH Statement Checklist

N,N-Dimethylformamide (DMF, CAS 68-12-2, EC 200-679-5, index number 616-001-00-X) carries harmonised classification under Regulation (EC) No 1272/2008: Flam. Liq. 3 H226; Acute Tox. 4 H312; Acute Tox. 4 H332; Eye Irrit. 2 H319; Repr. 1B H360D. Safety data sheet authoring under Regulation (EU) 2020/878 Annex II requires Section 14 transport information to be populated independently from the CLP label elements in Section 2.2 while remaining consistent with Section 9 physical properties. For DMF, the closed-cup flash point of 57 °C and boiling point of 153 °C place the substance in transport Class 3, Packing Group III. The proper shipping name is N,N-Dimethylformamide, not DMF or dimethylformamide. The harmonised Annex VI entry contains no EUH statement. The EUH checklist for pure DMF is therefore a negative confirmation; for DMF-based formulations, the checklist becomes composition-dependent.

A persistent SDS software defect occurs when Section 14 is auto-populated from a GHS classification field. CLP Flam. Liq. 3 and ADR Class 3 share the 23 °C to 60 °C flashpoint range, but they are separate determinations. A DMF mixture diluted with a high-boiling co-solvent may still be transport Class 3 when the closed-cup flash point remains below 60 °C; if the measured value exceeds 60 °C, the mixture leaves transport Class 3 unless a lower-flashpoint component is present. The reverse also applies if a low-flashpoint co-solvent is added. Section 14 must be recalculated for each formulation, not inherited from the base solvent record. In polyacrylonitrile wet-spinning lines, recovered DMF may contain water and dimethylamine; published data on flashpoint variability in recycled DMF is limited, so Section 9 should rely on a supplier certificate of analysis for each lot rather than a literature average.

Which transport fields require manual verification for DMF?

The Section 14 information elements required by Regulation (EU) 2020/878 Annex II include the UN number, proper shipping name, transport hazard class, packing group, environmental hazards, special precautions for user, and transport in bulk. Table 1 lists the verified multimodal parameters for DMF. The ADR/RID tunnel restriction code D/E is a transport document field, not an SDS label element. The ADR hazard identification number 30 appears on orange-coloured panels for tank and bulk carriage; it is not a GHS hazard code. IMDG EmS F-E, S-D applies to maritime shipments. The environmental hazard field remains “none assigned” because DMF is not classified under the transport environmental criteria and is not listed as an IMDG marine pollutant. ADR/RID and IMDG limited quantity values are both 5 L; the ADR excepted quantity code is E1. Transport documents must use the full proper shipping name N,N-Dimethylformamide.

ADR Chapter 1.3 requires carriers and packers to receive training for Class 3 flammable liquids. The SDS is not a dangerous goods declaration. For IBC shipments, the packaging instruction for Packing Group III applies, and the IBC type must be selected for a liquid with a flash point of 57 °C and a vapour pressure that is low but not negligible. A generic phrase such as “use explosion-proof equipment” is insufficient in Section 14; the special precautions line should reference grounding and bonding, segregation from strong oxidizers, and the decomposition risk described in Section 10. The Class 3 and packing group III assignments must not be presented as GHS categories. In Section 2.2, the label carries the signal word Danger and the pictograms GHS02, GHS07, GHS08; in transport, the Class 3 label carries a flame symbol under ADR. These two labelling systems remain separate in the SDS.

Because the transport regulations do not assign a Class 6.1 subsidiary risk to DMF, H312 and H332 must not appear as transport hazard labels. This is a frequent SDS authoring error when the Section 14 template pulls H phrases from the GHS classification block. The only transport hazard class is Class 3; any additional transport hazard class would require a separate dangerous goods evaluation. The CLP label still carries GHS07 and GHS08 for acute toxicity and reproductive toxicity.

When EUH statements are not automatically imported from Annex VI

The EUH checklist is often misapplied to DMF because the substance is a flammable liquid and a reproductive toxicant. EUH statements are supplementary hazard phrases assigned from CLP Annex II trigger conditions, not replacements for H codes. The harmonised Annex VI entry for DMF does not include EUH066, EUH071, EUH201, EUH204, EUH208, EUH209, EUH210, EUH211, EUH212 or EUH401. The absence of a harmonised EUH field does not indicate an incomplete SDS; it means no Annex II trigger applies to the pure substance. EUH066 “Repeated exposure may cause skin dryness or cracking” must not be assigned merely because DMF is harmful in contact with skin via H312. The acute dermal endpoint is covered by H312, while EUH066 has a separate repeated-exposure criterion.

For DMF-based formulations, the checklist becomes active only when Section 3 composition introduces a trigger. A DMF-borne polyurethane coating containing free isocyanate monomer may require EUH204 if the Annex II concentration threshold is exceeded. A DMF carrier containing a sensitiser at or above one-tenth of the generic concentration limit may require EUH208 if the mixture itself is not classified as a sensitiser. The calculation uses the concentration in the as-supplied mixture, not the dry film after solvent evaporation. If a skin sensitiser is present at 0.1% in DMF and the generic limit is 1.0%, EUH208 is activated when the mixture remains below the full H317 classification threshold. These percentages must be taken from Section 3.2 composition, not from mass balance approximations.

An additional audit point is the distinction between EUH014 and EUH032 in reactive DMF mixtures. DMF itself is miscible with water but not water-reactive. If a formulation includes thionyl chloride or phosphorus trichloride as reactive intermediate, the mixture may require EUH014 or EUH029 because of the added component. The SDS author must not transfer such EUH statements from a reactive mixture back to the pure DMF substance record. EUH210 must also be excluded for DMF because an SDS is required under REACH Article 31; EUH210 only applies where the supplier is permitted not to provide an SDS under Article 25(3) of CLP. Software defaults that auto-add EUH018 to every flammable liquid should be suppressed for DMF because Annex VI does not list EUH018 for the substance.

EUH statements are not part of placard or dangerous goods declaration text. They can appear in Section 2.2 and on the CLP label only. When a CLP label is affixed to a package that also carries ADR labels, the EUH statements remain in the CLP label area and must not be inserted into the dangerous goods panel. This separation prevents confusion between H/EUH hazard communication and transport class communication. A further check is the precautionary statement cascade. DMF under CLP carries P201, P280, P305+P351+P338, P308+P313, P337+P313, P403+P235 and P501. These are not Section 14 fields but should be consistent with the special precautions in Section 14. An SDS that states “evacuate area” in Section 14 but lacks P370+P378 for a Class 3 liquid creates a compliance inconsistency.

Physical property inputs and classification boundary checks

Section 14 depends on Section 9 physical property data and Section 10 decomposition data. The DMF closed-cup flash point of 57 °C is close to the 60 °C upper boundary for Packing Group III. A retest returning 61 °C would move the material outside transport Class 3, while the harmonised CLP Flam. Liq. 3 entry would remain in force for hazard classification purposes. Published data on the effect of small amounts of water on DMF flashpoint is limited; therefore the flashpoint method and lot-specific value must be recorded in Section 9. DMF is miscible with water, but water contamination does not automatically raise the flashpoint above 60 °C; the only valid approach is a closed-cup measurement on the actual mixture.

Packaging compatibility is a Section 14 special precaution when the solvent is stored for extended periods. DMF can swell or degrade certain plastics and elastomers, including low-density polyethylene and natural rubber. Stainless steel, high-density polyethylene or fluoropolymer-lined equipment is used for long-term contact, but the SDS should avoid a generic “use compatible containers” statement and instead reference the Section 7 engineering controls. DMF decomposes to dimethylamine and formic acid under acid-catalysed hydrolysis; elevated temperature accelerates this pathway. Section 10 should list the decomposition products, and Section 14 special precautions should refer to them without duplicating an EUH031 water-reactivity phrase.

The SDS author should also verify that Section 14.6 special precautions for user are not copied from Section 7 without transport-specific detail. Section 7 addresses workplace handling; Section 14 addresses segregation, packaging, and modal restrictions. For DMF, Section 14 should note segregation from strong acids and oxidizers in transport, grounding during bulk transfer, and the closed-cup flashpoint for package selection. This avoids the common defect of cross-pasting the same text in Sections 7 and 14 with no mode-specific information. For bulk maritime carriage of DMF under MARPOL Annex II, the International Bulk Chemical Code may list the product under a specific category. The SDS Section 14 should state the product name and category but should not duplicate cargo stowage requirements in the SDS. Published data for this specific configuration is limited; the maritime carrier should verify the IBC Code line entry before accepting a bulk shipment.

In pharmaceutical peptide synthesis and polyacrylonitrile spinning, a drum of DMF stored under nitrogen with interlocked exhaust ventilation, grounding and bonding is the operational arrangement expected from the SDS. Section 14 then states Class 3, Packing Group III, no marine pollutant, and no environmental hazard. The EUH statement field remains blank for the pure substance. If the same drum is subsequently converted into a mixture containing a sensitiser or a reactive monomer, the EUH208, EUH204 or EUH205 calculations are repeated. That Annex II trigger-based audit sequence, rather than a software default table, prevents Section 2.2 from accumulating statements that are not legally required.