Diglycolamine (DGA)
CAS 929-06-6 C4H11NO2
- CAS number
- 929-06-6
- EC number
- 213-195-4
- Formula
- C4H11NO2
- Molar mass
- 105.14 g/mol
Supply of Diglycolamine
- Grades
- Standard DGA Agent ≥98–99%; high-purity E-GRADE (electronic) for semiconductor stripper solutions.
- Packaging
- 218 kg (480 lb) drums · IBC · Bulk carbon-steel tank cars & stainless wagons with steam coils
- Documents
- CoA, SDS and TDS on request; certificate of origin where the destination requires it.
- Delivery
- Worldwide, including the United States, Canada, the United Kingdom, Germany and the rest of the EU, the United Arab Emirates, India, Singapore, Malaysia and Australia. Quoted EXW, FOB, CIF or DAP.
Diglycolamine is a liquid used to clean natural gas. Raw gas often contains hydrogen sulphide and carbon dioxide, which make it corrosive, and hydrogen sulphide is also poisonous. Gas plants circulate a diglycolamine solution that absorbs these gases and then releases them when heated, so the same liquid is used again and again. A very pure grade is used to strip coatings in semiconductor manufacturing.
Technical details
Diglycolamine is a primary alkanolamine that behaves chemically much like monoethanolamine but carries an ether linkage, which lowers its vapour pressure and allows it to run at far higher strength. Where an MEA unit typically circulates a 15 to 20 percent solution, DGA units run at 50 percent and above, so the same acid-gas duty moves less solvent through the plant and needs less heat to regenerate. It also picks up COS, which some amines leave behind. A high-purity electronic grade serves semiconductor photoresist stripping. Ehlinar supplies standard and electronic grades.
Appearance: Essentially colourless, slightly viscous liquid; faint amine odour; water-miscible.
Applications
How we supply
- Certificate of Analysis (CoA), lot-specific where available
- Safety Data Sheet (SDS / MSDS)
- Technical Data Sheet (TDS)
- Certificate of Origin / Certificate of Conformity
Independent third-party inspection can be arranged on request, with the agency and scope agreed per trade. Representative samples can be requested for qualification, subject to supplier availability. We recommend incoming quality control against the agreed CoA.
Quoted on standard Incoterms (e.g. EXW, FOB, CIF, DAP) as agreed per trade. Delivery region, packaging and grade are confirmed per quote.
Documents and services above are subject to supplier availability and confirmed per quote; nothing here is an offer.
Typical / indicative values — not a binding specification
| Property | Typical |
|---|---|
| Assay (standard DGA Agent) | ≥98–99% |
| Assay (E-GRADE, electronic) | High-purity — confirm per grade CoA |
| Water solubility | Miscible |
| Typical solution strength (gas sweetening) | ~50–60% |
Also known as
DGA · DGA Agent / Diglycolamine Agent · Diethylene glycolamine · 2-(2-aminoethoxy)ethanol · ADEG
Frequently asked questions
- How does DGA compare to MEA for gas treating?
- DGA runs at higher solution strength, which means lower circulation rates and lower regeneration energy, plus lower vapour loss than MEA.
- Does DGA remove COS?
- Yes — it removes carbonyl sulfide as well as H₂S and CO₂, an advantage over some amines.
- What material of construction is used?
- Carbon steel is standard; stainless steel is used for high-purity and E-GRADE service.
- What solution strength is DGA run at?
- Commonly 50 percent and above in water, against 15 to 20 percent for MEA. The higher strength is the main economic argument for DGA: less circulation, smaller equipment and lower regeneration duty for the same acid-gas removal. Acid-gas loading is still limited by corrosion, in practice to around 0.35 mole per mole.
- Does DGA freeze in storage?
- It can. DGA solidifies below roughly -12 °C, so tanks and lines in cold climates are normally traced or heated. It thaws without loss of quality.
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Related products
Figures and identifiers here are compiled from public references and provided for general information; they are indicative, not a specification. See all products.