Diethyl Hydroxyl Amine N,N- DEHA
N,N-DIETHYLHYDROXYLAMINE DEHA, N-Ethyl-N-Hydroxy-Ethanamine
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. |
Diethylhydroxylamine (DEHA) is an organic compound with the formula (C2H5)2NOH. It is a colorless liquid, although it is usually encountered as a solution. It is mainly used as an oxygen scavenger in water treatment. It is a volatile oxygen scavenger and reacts in a ratio of 2.8/1 DEHA/O2. It is employed in high pressure (>70 bar) boiler systems due to a very low rate of reaction at low temperatures and pressures. Due to its volatility, it acts as an oxygen scavenger throughout the entire boiler system due to steam carryover. DEHA also reacts with ferrous metals to form a passivized film of magnetite throughout the boiler system.
WATER TREATMENT
DEHA is used in Water Treatment Chemical Formulations for controlling corrosion in boiler very effectively due to its property of oxygen scavenging. It scores over conventional hydrazine hydrate since it is far less toxic and meets the standard for disposal of blow offs without any difficulty giving a good protection against corrosion at the same time.
• POLYMERIZATION
DEHA's powerful free radical scavenging ability coupled with its moderate volatility and relatively low order of acute toxicity makes it an ideal "popcorn Polymer "/ vapour phase inhibitor for olefins or styrene monomer storage & recovery system. Because of its capability of inhibiting polymerization in the gas phase, DEHA is finding use as an in-process inhibitor for the production of styrene, divinylbenzene, butadiene, isoprene and other monomers containing a reactive double bond.
• PHOTOGRAPHIC CHEMICALS
DEHA has reducing property, so it is used as an auxiliary chemical photographic developer for instant colour photos. Also, DEHA is effective in stabilization of image and in the prevention of discolouration.
• DECOLOURISATION
Phenol and Phenolic antioxidants can be decolourised with DEHA.
• INHIBITORS
DEHA can be used as a colour stabiliser of monoalkyl phenol.
• SILICON RUBBER
DEHA can be used as a raw material for the hardener of the Silicon Sealant and coating agent.
Application Area :
Water Treatment :
DEHA is used in Water Treatment Chemical Formulations for controlling corrosion in boiler very effectively due to its property of oxygen scavenging.It scoresover conventional hydrazine hydrate since it is far less toxic and meets the standard for disposal of blow offs without any difficulty giving a good protection against corrosion at the same time.
Polymerization:
DEHA's powerful free radical scavenging ability coupled with its moderate volatility and relatively low order of acute toxicity makes it an ideal "popcorn Polymer "/ vapour phase inhibitor for olefins or styrene monomer storage & recovery system.Because of its capability of inhibiting polymerization in the gas phase, DEHA is finding use as an in-process inhibitor for the production of styrene, divinylbenzene, butadiene, isoprene and other monomers containing a reactive double bond.
Photographic Chemicals:
DEHA has reducing property, so it is used as an auxiliary chemical photographic developer for instant colour photos. Also, DEHA is effective in stabilization of image and in the prevention of discolouration.
Decolourisation : Phenol and Phenolic antioxidants can be decolourised with DEHA.
Inhibitors: DEHA can be used as a colour stabiliser of monoalkyl phenol.
Silicon Rubber: DEHA can be used as a raw material for the hardener of the Silicon Sealant and coating agent.
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.
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