Harmony Technology: Refrigerant & Chemical Sourcing from China

Refrigerants, Chloromethanes, Intermediates & Specialty Gases — China chemical sourcing. We are a trading partner — not a manufacturer pretending to be one — helping importers buy the right product, with the right documents, in the right quantity.

Product supply pages

Specification basis, documents per shipment and quotation terms, one page per grade.

• R134a supply: MOQ, packaging and lead time

Buyer Guides (Q&A)

• R134a Supply: Specification, Minimum Order, Packaging and Lead Time

  How a R134a order is actually shaped — the minimum quantity in cylinders, what one 20GP carries, which ports load, the lead time, the documents that travel with each lot, and the specification basis we quote against.

• Chloromethanes Compared: Methyl Chloride, DCM, Chloroform and Perchloroethylene — Properties, Class and Packaging

  Methyl chloride (CAS 74-87-3), dichloromethane (75-09-2), chloroform (67-66-3) and perchloroethylene (127-18-4) compared on the four properties that decide a shipment: boiling point, density, UN class and the containment each one therefore allows.

• Electronic Specialty Gases: the CAS-Listed Fluorinated Gases We Supply for Export

  An electronic specialty gas is bought by substance and grade, not by brand: a CAS number fixes the substance, the specification sheet fixes the impurity limits, and a certified pressure container gets it to your line.

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

  Four fine-chemical intermediates — o-bromochlorobenzene (CAS 694-80-4), CDMT (CAS 3140-73-6), vinyl laurate (CAS 2146-71-6) and ETFBO (CAS 17129-06-5) — quoted by CAS and assay, with the packaging each one travels in and the six items an enquiry has to carry.

• The Chlorinated Products Line: Methyl Chloride, Dichloromethane, Chloroform and Perchloroethylene

  Four chlorinated products — methyl chloride (CAS 74-87-3, UN 1063), dichloromethane (75-09-2, UN 1593), chloroform (67-66-3, UN 1888) and perchloroethylene (127-18-4, UN 1897): what decides the grade, the packing and the documents.

• Sourcing the Rest of the List: Acids, Alkalis, Solvents, Esters and Alcohols We Supply

  Beyond refrigerants, chloromethanes and electronic gases: the acids, alkalis, solvents, esters, glycols and inorganics the group supplies, grouped by what decides the purchase — packaging, state at ambient, and the two acids that are domestic-market only.

• Which Refrigerants, Chloromethanes and Electronic Specialty Gases Are Supplied, in Which Grades and Packing Formats

  Twelve refrigerant grades — R22, R32, R134a, R404A, R407C, R410A, R507A, R448A, R449A, R452B, R454B and R1234yf — plus four chlorinated products (methyl chloride, dichloromethane, chloroform, perchloroethylene) and four fluorinated electronic specialty gases (CF₄, C₂F₆, C₄F₈, C₃F₆): the grades supplied, the UN entry and class each one carries, the packing format each product state allows, the documents issued per shipment, and the markets served. R134a is UN 3159, R410A is UN 3163 or UN 1078, R32 is UN 3252, methyl chloride is UN 1063 and dichloromethane is UN 1593.

• R404A / R507A / R448A / R449A: Composition, GWP and Retrofit Limits

  These four are not interchangeable. Composition determines glide, and glide determines whether a retrofit is a drop-in or a rebuild.

• Refrigerant Charge Amount: How It Is Calculated, and Why A2L Systems Have a Room-Size Limit

  Two different questions get confused: 'how much does this system need' (performance) and 'how much may this room contain' (safety). They are governed by different.

• HS Codes for Refrigerants and Chlorinated Solvents in 2026: What Your Broker Actually Needs

  The 6-digit HS code is a starting point, not an answer. Since HS 2022, single HFCs left the old 'catch-all' line and blends moved to a new heading — and the code.

• R134a System Compatibility: Pressure–Temperature Data, Lubricant Interaction, and Sealing Material Selection

  R134a (CAS 811-97-2, ASHRAE A1) runs higher pressure than R12 and is immiscible with mineral oil. Saturation tables, POE handling limits, and elastomer selection for retrofit or specification.

• R22, R32, R410A and R407C: Physical Properties Compared, and Why Drop-in Replacement Fails

  GWP (AR4/AR5), ODP, critical temperature and temperature glide compared — plus the mechanism by which a zeotropic blend like R407C changes composition on leakage.

• Dichloromethane (DCM, CAS 75-09-2): Specification Grades, UN Packing Requirements, and Export Documentation

  DCM has three commercial specification grades, a Class 6.1 classification (UN 1593), and a 39.6 °C boiling point that makes packaging selection a pressure problem — not a container-volume problem.

• HFC Quotas and the EU F-gas Regulation: The Actual Mechanism, Numbers, and Phase-down Schedule

  Kigali Amendment phase-down and EU Regulation (EU) 2024/573 use the same unit of account (tonnes CO₂-equivalent) but different baselines and scopes. Production rights fall to 15 % of the 2011–2013 average by 2036.

• Reading a Chinese Chemical COA: Test Methods, Raw Data, and What Each Parameter Actually Proves

  A certificate of analysis is only as strong as the method behind each number. GC-FID purity, Karl-Fischer water, titration acidity — what each parameter measures, and what a COA cannot tell you.

• Dangerous Goods Mixed Loading for Refrigerants and Solvents: IMDG Segregation, UN Marks, and Cylinder Stacking

  R32 is UN 3252 (Class 2.1) and R134a is UN 3159 (Class 2.2) — they may share a container, never a UN number. IMDG segregation degrees, UN packaging-mark decode, cylinder filling ratios and IBC ullage rules for mixed refrigerant and solvent cargoes.

What we do

• Refrigerants: R22, R32, R134a, R404A, R407C, R410A, R143a & blends
• Chloromethanes: DCM (dichloromethane), chloroform
• Chemical intermediates & specialty gases
• Compliance-first export: COA, MSDS, dangerous-goods packing, quota-aware supply