Diethyl Hydroxyl Amine DEHA
DEHA oxygen scavengers useful in Boiler feedwater and steam-condensate systems
Application & Uses
It is use for Water Treatment Chemical, Corrosion Inhibitor, Polymerization, Photographic Chemicals, Decolourisation, etc.
DEHA used as a volatile oxygen scavenger and reacts in a ratio of 2.8/1 DEHA/O2.
RXSOL Product DEHA
RXSOL DEHA Oxygen Scavenger 25%
DEHA-based liquid oxygen scavenger for boiler feedwater treatment, dissolved oxygen control, metal passivation and steam-condensate corrosion protection.
DEHA Oxygen Scavenger, Diethylhydroxylamine Water Treatment, Boiler Oxygen Scavenger, DEHA 25% Solution, Volatile Oxygen Scavenger, Boiler Feedwater Corrosion Inhibitor, DEHA Chemical Supplier India UAE Oman.
Dosage & Directions for Use
Recommended Dosage
|
Parameter |
Typical Starting Guidance |
|---|---|
|
Theoretical DEHA requirement |
1.24 ppm per 1 ppm O₂ |
|
Practical active DEHA dosage |
2–3 ppm per 1 ppm O₂ |
|
DEHA residual target |
Often 0.5–1.0 ppm, program-dependent |
|
Recommended injection point |
Deaerator storage section or feedwater line |
|
Dosage control |
Dissolved oxygen and DEHA residual testing |
Application Area of DEHA :
Water Treatment , Polymerization, Photographic Chemicals, Decolourisation , Inhibitors, Silicon Rubber
Example Dosage Calculation
For boiler feedwater containing 0.1 ppm dissolved oxygen:
-
Feedwater volume: 10,000 litres
-
Dissolved oxygen: 0.1 mg/L
-
Practical starting dosage: 3 mg active DEHA per mg O₂
-
Required active DEHA: 3 grams
-
Required 25% DEHA solution: 12 grams
This is an illustrative oxygen-demand calculation, excluding any additional requirement for maintaining the specified DEHA residual.
Technical Specifications & Properties
Physical Properties
| Empirical Formula | C4H11NO | |
| Molecular Wt | 89.1 | |
| DEHA 98% | DEHA 85% | |
| Sp. Gr. at 20°C | 0.855 - 0.875 | 0.895 - 0.905 |
| Refractive Index | 1.418 - 1.420 | 1.418 - 1.420 |
| Boiling Point | 124 to 126°C | 94 to 96°C |
| Freezing Point | -25 to -27°C | Below 0°C |
| Flash Point (Closed C) | Below 45°C | 45 to 47°C |
| Solubility in water | Soluble | Soluble |
| pH | 10.2 | 10 |
Specification :
| Specification | DEHA 98% | DEHA 85% |
| Purity as DEHA (wt. %) | 98.00 min. | 85.00 min. |
| Water Content (% by wt.) | -- | 15.00 max |
| Ethylamines (% by wt.) | 0.5 max. | 0.05 max. |
Typical Technical Specifications
|
Parameter |
Typical Value |
|---|---|
|
Appearance |
Clear, colourless to pale yellow liquid |
|
Chemical Name |
N,N-Diethylhydroxylamine |
|
CAS Number |
3710-84-7 |
|
Molecular Formula |
C₄H₁₁NO |
|
Active Concentration |
85% DEHA or formulated aqueous solutions |
|
Molecular Weight |
89.14 g/mol |
|
Solubility |
Miscible with water |
|
Function |
Oxygen scavenging and corrosion control |
|
Application |
Boiler feedwater and steam-condensate systems |
These specifications are indicative. Commercial DEHA oxygen scavengers are available at different active concentrations, including diluted boiler-treatment formulations.
Recommended Industrial & Shipboard Areas
Why DEHA used as Oxygen Scavender in High Pressure Boiler?
DEHA It is employed in high pressure (>70 bar) Boiler systems due to a very low rate of reaction at low temperatures and pressures.
DEHA Mechanism of Oxygen Removal
DEHA reacts with dissolved oxygen according to the simplified reaction:
The theoretical requirement is approximately 1.24 mg of pure DEHA per mg of dissolved oxygen.
In practical boiler operation, approximately 2–3 mg of active DEHA per mg of dissolved oxygen may be used as an initial dosing basis, with adjustments for residual requirements and system conditions.
Product Description & Chemical Profile
A colourless to pale yellow transparent liquid, available as 98% DEHA and also as 85% solution in water. Di Ethyl Hydroxyl Amine (DEHA) is versatile products use for Controlling the corrosion inhibitor, Photographic etc.
DEHA – Diethylhydroxylamine for Water Treatment
Chemical Name: N,N-Diethylhydroxylamine (DEHA) CAS Number: 3710-84-7 Molecular Formula: C₄H₁₁NO Molecular Weight: 89.14 g/mol Product Category: Boiler Water Treatment / Oxygen Scavenger / Corrosion Inhibitor
Product Description
DEHA (Diethylhydroxylamine) is an organic, volatile oxygen scavenger widely used in industrial boiler water-treatment systems to control dissolved oxygen and minimize oxygen-induced corrosion.
DEHA reacts with dissolved oxygen in boiler feedwater and helps protect boiler internals, feedwater lines and condensate return systems.
Unlike conventional sodium sulfite oxygen scavengers, DEHA does not introduce dissolved inorganic salts into boiler water. This makes it useful in appropriately designed high-pressure boiler treatment programs where controlling dissolved solids is important.
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