Which intermediates can be supplied?

Four building blocks: o-bromochlorobenzene (CAS 694-80-4), CDMT — 2-chloro-4,6-dimethoxy-1,3,5-triazine (CAS 3140-73-6), vinyl laurate (CAS 2146-71-6) and ETFBO — 4-ethoxy-1,1,1-trifluoro-3-buten-2-one (CAS 17129-06-5). Each is quoted by CAS number and assay, not by a brand code.

Why does an intermediate need a CAS number in the enquiry rather than a trade name?

Because a trade name does not fix the structure. Two suppliers can use the same trade name for different isomers, and an isomer is a different purchase — different assay method, sometimes a different hazard classification. The CAS number is what the specification sheet and the COA have to agree on.

What does the assay mean on an intermediate specification?

It is the content of the named compound, measured by a stated method — typically GC or HPLC area percentage. An assay figure without the method behind it cannot be checked at receipt, so the specification sheet states both.

How are intermediates packaged?

By state: liquids in closed-head steel drums or UN-marked IBCs, solids in fibre drums or 25 kg bags, and small qualification lots in smaller containers when a customer has to run a trial before committing to a drum.

Can a sample be supplied before a first order?

Usually yes — the constraint is normally the producing plant's minimum rather than our willingness. A sample is quoted with its own specification sheet, so the trial runs against the same target as the order.

Intermediates We Supply: CAS Numbers, Grade Basis and How Each One Is Quoted

Mon, 12 Oct 2026 · HARMONY TECHNOLOGY (ZHEJIANG) CO., LTD.

The short answer: four intermediates — o-bromochlorobenzene (CAS 694-80-4), CDMT (CAS 3140-73-6), vinyl laurate (CAS 2146-71-6) and ETFBO (CAS 17129-06-5). Each is quoted by CAS number and assay, because an intermediate is bought by structure and purity, not by trade name.

The four intermediates

Compound	Synonyms	CAS	Typical role	State	Packaging
o-Bromochlorobenzene	1-bromo-2-chlorobenzene; 2-bromochlorobenzene; 1-chloro-2-bromobenzene	694-80-4	dihalogenated benzene building block for dyes, liquid-crystal materials and agrochemical actives	liquid	closed-head drums, UN-marked IBCs
CDMT	2-chloro-4,6-dimethoxy-1,3,5-triazine	3140-73-6	triazine core used as a carboxylic-acid activating reagent, and the precursor for in-situ DMTMM generation	solid	fibre drums, 25 kg bags
Vinyl laurate	ethenyl dodecanoate; vinyl dodecanoate	2146-71-6	vinyl ester used as an acyl donor in enzymatic transesterification and as a monomer for poly(vinyl laurate)	liquid	closed-head drums, IBCs
ETFBO	4-ethoxy-1,1,1-trifluoro-3-buten-2-one; 4-ethoxy-1,1,1-trifluorobut-3-en-2-one	17129-06-5	fluorinated enone building block for trifluoromethyl chemistry	liquid	closed-head drums, small containers

Note on the ETFBO CAS: 4-ethoxy-1,1,1-trifluoro-3-buten-2-one is supplied as a defined geometric isomer, and the registry entries for this name carry more than one number — PubChem CID 2780395 lists 17129-06-5 and 59938-06-6 for the same structure, consistent with the E/Z pair. The specification sheet for this grade therefore states the isomer together with the CAS registered for it, rather than leaving the buyer to infer it from a trade name. The number on this page (17129-06-5) is the one our portfolio records for the grade; if the specification you are qualifying against names the other registry number, say so in the enquiry and it will be matched to the grade rather than assumed.

⇒ Three things follow from the table. First, a trade name is not an identity: “CDMT” is unambiguous because it maps to one CAS, but a name like “bromochlorobenzene” spans three positional isomers, and only one of them is this grade. Second, the state decides the packaging — CDMT is a solid and travels in fibre drums or bags, while the other three are liquids and travel in closed-head drums or IBCs; an enquiry that specifies “drum” for a solid has not been read. Third, assay is a method, not a number: on a fine chemical the specification states the content and the method (GC or HPLC area percent).

What an intermediate enquiry has to carry

Item	Why it decides the quote
CAS number	Fixes the structure; a trade name does not
Assay or purity target	GC/HPLC percentage — the grade tier
Water content and any limit on residual solvent	Changes the drying and packaging step
Isomer, where the compound has one	A different purchase, not a different price
Quantity for the first order, and the annual run rate	Decides package size and whether the plant runs a campaign
Destination and end use	Drives the document set (SDS in the required language, transport classification)

How an intermediate is quoted and documented

A quotation for one of these four carries: the compound name and CAS, the assay and the method it is measured by, the specified impurities or limits, the packaging, the net weight per unit and the document set issued with the shipment (specification sheet, batch COA, SDS, and the transport document for the route). Where a customer has to qualify the material first, a sample lot is quoted against the same specification, so the trial and the order are measured on the same target.

What we can provide

All four intermediates are supplied by the group’s operating companies, quoted by CAS and assay, with the specification sheet issued before the order rather than after it. Where the end use is regulated at the destination, the requirement is stated rather than implied, and the documents that support the buyer’s own filing are listed on the quotation.

Who contracts and ships: every shipment is contracted, invoiced and shipped by the group operating company named on the quotation and on the documents for that shipment. This page is the group’s technical reference material.

Which refrigerants and chloromethanes are supplied, in which grades and packing formats — the same CAS-and-class discipline applied to the gas and solvent lines.
Reading a COA against the specification sheet — how the batch documents are checked at receipt.
Refrigerant HS codes and the classification of mixtures — the same classification question on the gas side.

Sources

1-Bromo-2-chlorobenzene — CAS 694-80-4, formula C₆H₄BrCl, MW 191.45 (NIST WebBook): https://webbook.nist.gov/cgi/cbook.cgi?ID=694-80-4
1-Bromo-2-chlorobenzene, EC 211-775-1 (Sigma-Aldrich product page): https://www.sigmaaldrich.com/US/en/product/aldrich/b60401
2-Chloro-4,6-dimethoxy-1,3,5-triazine — CAS 3140-73-6, C₅H₆ClN₃O₂, MW 175.57 (ChemScene): http://chemscene.com/product/3140-73-6.html
CDMT as carboxylic-acid activating reagent and DMTMM precursor (Mironova Labs product page): https://www.mironova.com/products/coupling-reagents/cdmt
Vinyl laurate — CAS 2146-71-6, CH₃(CH₂)₁₀COOCH=CH₂, MW 226.36, EC 218-414-7 (Sigma-Aldrich product page): https://www.sigmaaldrich.com/US/en/product/aldrich/61725
Round-trip registry check of all four CAS numbers (NIH PubChem PUG-REST, queried 2026-10-12): each CAS resolves back to the named structure — 694-80-4 ⇒ CID 12754 (1-bromo-2-chlorobenzene, C₆H₄BrCl)｜3140-73-6 ⇒ CID 18450 (2-chloro-4,6-dimethoxy-1,3,5-triazine, C₅H₆ClN₃O₂)｜2146-71-6 ⇒ CID 75069 (ethenyl dodecanoate, C₁₄H₂₆O₂)｜17129-06-5 ⇒ CID 2780395 (4-ethoxy-1,1,1-trifluorobut-3-en-2-one, C₆H₇F₃O₂). https://pubchem.ncbi.nlm.nih.gov/rest/pug/compound/name/17129-06-5/property/IUPACName,MolecularFormula/JSON

Prepared by Hangrui Holdings Limited (Hong Kong) — the group holding company. Intermediates are contracted, invoiced and shipped by the group’s operating companies: HARMONY TECHNOLOGY (ZHEJIANG) CO., LTD., QUZHOU HUAFU NEW REFRIGERATION MATERIAL CO., LTD. and RIBOLUO CHEMICALS (ZHEJIANG) CO., LTD. Grades listed are those the operating companies can supply; the binding figures for any shipment are those on the specification sheet and the COA for that lot.

采购实操 · Harmony Technology can provide.
Need current specs, quota status, or a mixed-load quote for CAS Numbers, Grade Basis and How Each One Is Quoted? Contact tom@hm-chem.com with your spec & destination port.