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Send EmailDiethylhydroxylamine, Diethyl Hydroxyl Amine, DEHA, 3710-84-7
DEHA (DIETHYLHYDROXYLAMINE)
SECTION 1: PRODUCT IDENTIFICATION AND CHEMICAL IDENTITY
| Parameter | Information |
|---|---|
| Product Name | DEHA (Diethylhydroxylamine) |
| Chemical Name (IUPAC) | N,N-Diethylhydroxylamine |
| Synonyms (Turkish) | Dietilhidroksilamin, DEHA |
| Synonyms (English) | Diethylhydroxylamine, N,N-Diethylhydroxylamine, DEHA |
| CAS Number | 3710-84-7 |
| EC Number (EINECS) | 223-055-4 |
| Molecular Formula | C₄H₁₁NO |
| Molecular Weight | 89.14 g/mol |
| Chemical Class | Hydroxylamine derivative; Organic amine |
| Appearance | Colorless to light yellow liquid |
| Odor | Mild amine-like odor |
| Physical State (20°C) | Liquid |
| Solubility | Soluble in water and organic solvents |
| Note | DEHA is a strong reducing agent and oxygen scavenger. It is widely used for corrosion control, especially in boiler feed water and condensate lines. Its volatile structure provides protection in steam and condensate lines, and it does not increase water conductivity after reaction. It also functions as a polymerization inhibitor, antioxidant, and photochemical smog inhibitor. |
SECTION 2: CHEMICAL STRUCTURE
DEHA (Diethylhydroxylamine) is an organic compound with a central nitrogen atom. This nitrogen atom is bonded to three different groups:
A hydroxyl group (-OH)
Two ethyl groups (-CH₂-CH₃ or -C₂H₅)
This structure gives DEHA both amine (organic base) and hydroxylamine (reducing agent) properties. The lone electron pair on nitrogen and the presence of the hydroxyl group are the source of its strong reducing and oxygen scavenging capabilities.
| Parameter | Description |
|---|---|
| Structure Description | A hydroxyl group (-OH) and two ethyl groups (-C₂H₅) are attached to the central nitrogen atom. |
| Simplified Structure | (C₂H₅)₂N—OH |
| Molecular Formula | C₄H₁₁NO |
| Molecular Weight | 89.14 g/mol |
| Functional Groups | Hydroxylamine (-N-OH), two ethyl groups |
| SMILES | CCN(CC)O |
| InChI Key | KXKPNPVKZJEGJH-UHFFFAOYSA-N |
| Hydrogen Bond Donors | 1 (from OH group) |
| Hydrogen Bond Acceptors | 2 (from O and N atoms) |
| Rotatable Bond Count | 2 (two ethyl groups) |
| Polar Surface Area (PSA) | 23.5 Ų |
SECTION 3: PHYSICAL AND CHEMICAL PROPERTIES
| Property | Value | Test Method / Note |
|---|---|---|
| Appearance | Colorless to light yellow liquid | Visual |
| Odor | Mild amine-like odor | Olfactometric |
| Molecular Weight | 89.14 g/mol | Calculated |
| Purity | ≥ 85% | Titration / GC |
| Density (20°C) | ~0.90-0.91 g/cm³ | ASTM D4052 |
| Boiling Point | ~125-130°C | - |
| Melting Point | -35°C | - |
| Flash Point | ~45-50°C (closed cup) | ASTM D93 |
| Solubility in Water | Completely soluble | General Method |
| pH (1% Solution) | ~8.5-10.0 (basic) | pH Meter |
| Vapor Pressure (20°C) | ~5-10 mmHg | - |
| Viscosity (20°C) | Low | - |
| Moisture Content | ≤ 15% | Karl Fischer |
| Diethylamine Content | ≤ 1% | GC |
| Color (Pt/Co) | ≤ 70 | ASTM D1209 |
| Log P (Octanol/Water) | ~0.5-1.0 | Calculated |
| Autoignition Temperature | >200°C | - |
| Volatility | High | - |
SECTION 4: CHEMICAL PROPERTIES AND REACTIVITY
| Parameter | Information |
|---|---|
| Chemical Class | Hydroxylamine derivative; Organic amine |
| Reactivity | Strong reducing agent; Oxygen scavenger |
| Oxygen Binding Reaction | 4 (C₂H₅)₂NOH + O₂ → 4 (C₂H₅)₂NO + 2H₂O |
| Stability | Stable under normal conditions; Slow oxidation in light and air |
| Volatility | High (provides protection in steam and condensate lines) |
| Conductivity | Does not increase water conductivity after reaction |
| Incompatible Materials | Strong oxidizing agents, strong acids, strong bases |
| Decomposition Products (Heating) | NOx, CO₂, H₂O |
| pH Compatibility | Compatible in pH ≥ 7 systems |
| Metal Passivation | Forms a passivation film on metal surfaces |
SECTION 5: FUNCTIONAL PROPERTIES
| Property | Description |
|---|---|
| Oxygen Scavenger | Chemically binds dissolved oxygen to prevent oxygen-induced corrosion in systems. |
| Corrosion Inhibitor | Forms a protective passivation film on metal surfaces; prevents pitting and general corrosion. Its volatile structure provides protection in steam and condensate lines. |
| Polymerization Inhibitor | Inhibits polymerization in vinyl monomers (styrene, acrylate, methacrylate); extends shelf life. |
| Antioxidant | Prevents oxidation in oils, resins, and photography; acts as a free radical scavenger. |
| Photochemical Smog Inhibitor | Reacts with NOx to reduce ozone formation; inhibits photochemical smog. |
| Conductivity | Does not increase water conductivity after reaction (advantage over hydrazine and carbohydrazide). |
SECTION 6: USE AS OXYGEN SCAVENGER
| Parameter | Information |
|---|---|
| Stoichiometric Ratio | ~3 ppm DEHA for 1 ppm O₂ (theoretical) |
| Dosing Method | Continuous dosing (to feed water line) |
| Reaction Rate | Fast (at room temperature) |
| Reaction Products | Diethylnitroxide (C₂H₅)₂NO + H₂O |
| Volatility | High (provides steam and condensate line protection) |
| Conductivity Effect | No increase in conductivity after reaction |
| pH Compatibility | Compatible in pH ≥ 7 systems |
| Temperature Range | Effective in the range of 20-300°C |
| Corrosion Control | Converts iron oxides (Fe₂O₃) to magnetite (Fe₃O₄) |
| Application Areas | Boiler feed water, condensate lines, cooling circuits |
SECTION 7: USE AS POLYMERIZATION INHIBITOR
| Parameter | Information |
|---|---|
| Target Monomers | Styrene, acrylate, methacrylate, vinyl monomers |
| Mechanism of Action | Free radical scavenger; inhibits polymerization initiators |
| Typical Concentration | 50-500 ppm (based on monomer) |
| Temperature Range | Effective in the range of 20-150°C |
| Volatility | High (removes during distillation) |
| Advantage | Colorless, volatile, no recovery required |
| Application Areas | Styrene production, acrylate production, monomer storage |
SECTION 8: APPLICATION AREAS
| Sector | Application | Function |
|---|---|---|
| Boiler Water Treatment | Oxygen scavenger, corrosion inhibitor | Binds dissolved oxygen, prevents corrosion |
| Condensate Lines | Oxygen scavenger | Provides protection in steam and condensate lines |
| Petroleum Refineries | Corrosion inhibitor | Process water treatment |
| Polymer Production | Polymerization inhibitor | Prevents polymerization in vinyl monomers |
| Chemical Industry | Antioxidant, intermediate | Oils, resins, photography |
| Environmental Protection | Smog inhibitor | Reduces photochemical smog formation |
| Power Plants | Oxygen scavenger | Feed water treatment |
| Food Packaging | Oxygen scavenger | In-package oxygen removal |
SECTION 9: QUALITY SPECIFICATIONS
| Parameter | Specification | Test Method |
|---|---|---|
| Appearance | Colorless to light yellow liquid | Visual |
| Purity (DEHA) | ≥ 85.0% | Titration / GC |
| Moisture Content | ≤ 15.0% | Karl Fischer |
| Diethylamine Content | ≤ 1.0% | GC |
| Color (Pt/Co) | ≤ 70 | ASTM D1209 |
| Density (20°C) | 0.900 – 0.915 g/cm³ | ASTM D4052 |
| pH (1% Solution) | 8.5 – 10.0 | pH Meter |
| Heavy Metals (Pb) | ≤ 5 ppm | ICP-MS |
| Iron (Fe) | ≤ 5 ppm | ICP-MS |
| Chloride (Cl) | ≤ 0.05% | Titrimetric |
| Sulfate (SO₄) | ≤ 0.05% | Turbidimetric |
SECTION 10: OXYGEN SCAVENGER CAPACITY (COMPARATIVE)
| Parameter | DEHA | Hydrazine | Carbohydrazide |
|---|---|---|---|
| O₂ Binding Capacity (theoretical) | 1:3 (DEHA:O₂) | 1:1 | 1:2 |
| Reaction Rate (25°C) | Fast | Medium | Fast |
| Volatility | High | Low | Low |
| Conductivity Effect | None | Present | Present |
| Vapor Phase Protection | Yes | No | No |
| Toxicology | Low | High | Medium |
| pH Compatibility | ≥ 7 | Wide | Wide |
| Temperature Range | 20-300°C | 20-300°C | 20-300°C |
SECTION 11: SAFETY PROFILE AND TOXICOLOGICAL ASSESSMENT
| Parameter | Value / Description |
|---|---|
| GHS Classification | Warning (flammable liquid, irritant) |
| Signal Word | Warning |
| Hazard Pictograms | GHS02 (Flame), GHS07 (Exclamation Mark) |
| Hazard Statements (H-Codes) | H226 (Flammable liquid and vapor), H315 (Causes skin irritation), H319 (Causes serious eye irritation), H335 (May cause respiratory irritation) |
| Acute Oral Toxicity (LD50, Rat) | ~1,500-2,500 mg/kg (low toxicity) |
| Acute Dermal Toxicity (LD50, Rabbit) | > 2,000 mg/kg (low toxicity) |
| Skin Irritation | Mild irritant |
| Eye Irritation | Mild-moderate irritant |
| Carcinogenicity | Not classified as carcinogenic |
| Mutagenicity | Not mutagenic |
| Target Organs | Skin, eyes, respiratory tract |
| NOAEL (Rat, 90 days) | ~50-100 mg/kg/day |
| Important Note | Significantly safer than hydrazine. |
SECTION 12: GHS CLASSIFICATION AND LABELING
GHS Classification (compliant with 1272/2008/EC):
| Hazard Class | Category | H-Statement |
|---|---|---|
| Flammable Liquid | Category 3 | H226 |
| Skin Irritation | Category 2 | H315 |
| Eye Irritation | Category 2 | H319 |
| STOT - SE | Category 3 | H335 |
Signal Word: Warning
Hazard Pictograms: GHS02 (Flame), GHS07 (Exclamation Mark)
NFPA 704 Hazard Classification:
| Health | Flammability | Reactivity | Special |
|---|---|---|---|
| 2 (Moderate) | 2 (Combustible) | 1 (Moderate) | - |
SECTION 13: PRECAUTIONARY STATEMENTS (P-CODES)
| Code | Statement |
|---|---|
| P210 | Keep away from heat/sparks/open flames/hot surfaces. |
| P233 | Keep container tightly closed. |
| P240 | Ground/bond container and receiving equipment. |
| P241 | Use explosion-proof electrical/ventilating/lighting equipment. |
| P242 | Use only non-sparking tools. |
| P243 | Take precautionary measures against static discharge. |
| P261 | Avoid breathing dust/fume/gas/mist/vapors/spray. |
| P264 | Wash hands thoroughly after handling. |
| P271 | Use only outdoors or in a well-ventilated area. |
| P280 | Wear protective gloves/protective clothing/eye protection/face protection. |
| P303+P361+P353 | IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water/shower. |
| P304+P340 | IF INHALED: Remove person to fresh air and keep comfortable for breathing. |
| P305+P351+P338 | IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. |
| P312 | Call a POISON CENTER/doctor if you feel unwell. |
| P332+P313 | If skin irritation occurs: Get medical advice/attention. |
| P337+P313 | If eye irritation persists: Get medical advice/attention. |
| P370+P378 | In case of fire: Use appropriate extinguisher to extinguish. |
| P403+P233 | Store in a well-ventilated place. Keep container tightly closed. |
| P405 | Store locked up. |
| P501 | Dispose of contents/container in accordance with local/regional/national/international regulations. |
SECTION 14: FIRST AID MEASURES
| Exposure Route | Action to Take |
|---|---|
| Inhalation | Move to fresh air. If respiratory symptoms persist, seek medical attention. |
| Skin Contact | Remove contaminated clothing. Wash with plenty of soap and water. If irritation occurs, seek medical attention. |
| Eye Contact | Rinse with plenty of water for at least 15 minutes. Keep eyelids open. Remove contact lenses if present. If irritation persists, seek medical attention. |
| Ingestion | Rinse mouth with water. Do NOT induce vomiting. Drink 1-2 glasses of water. Seek medical attention. |
| Note | Treat symptomatically. No specific antidote. |
SECTION 15: FIREFIGHTING MEASURES
| Parameter | Information |
|---|---|
| Fire Hazard | Flammable liquid (Flash point: ~45-50°C) |
| Hazards from Fire | NOx, CO₂, CO |
| Suitable Extinguishing Media | Water spray, CO₂, dry chemical powder, alcohol-resistant foam |
| Unsuitable Extinguishing Media | Water jet (may spread burning liquid) |
| Special Protective Equipment | SCBA (Self-Contained Breathing Apparatus), full protective clothing |
SECTION 16: STORAGE AND SHELF LIFE
| Parameter | Information |
|---|---|
| Storage Conditions | Store in a cool (15-25°C), dry, well-ventilated area; protect from direct sunlight and heat sources. |
| Temperature Limits | 15-25°C (ideal); should not exceed 30°C |
| Humidity | Low humidity environment |
| Light | Protect from light (to prevent oxidation) |
| Container Requirements | Tightly closed, chemically resistant containers (HDPE, stainless steel, lined steel) |
| Materials to Protect From | Heat, sparks, flames, strong oxidizing agents, acids |
| Shelf Life | 12 months (in unopened original packaging, under proper storage conditions) |
| Signs of Degradation | Darkening of color, odor change, increase in viscosity |
SECTION 17: PACKAGING OPTIONS
| Packaging Type | Quantity / Capacity | Material | Application Area |
|---|---|---|---|
| HDPE Drum | 200 L | HDPE | Industrial, water treatment |
| IBC Container | 1000 L | HDPE | Large-scale industrial supply |
| Glass Bottle | 1 L, 5 L, 10 L | Amber glass | Laboratory, high purity |
| Metal Drum (Lined) | 200 L | Lined steel | Industrial supply |
| Flexibag | 1000 L | PE | Bulk transportation |
SECTION 18: TRANSPORT INFORMATION
| Parameter | Information |
|---|---|
| UN Number | UN 1993 (Flammable Liquid, N.O.S.) |
| Hazard Class | Class 3 - Flammable Liquids |
| Packing Group | III |
| ADR/RID | Class 3; UN 1993; Packing Group III |
| IMDG Code | Class 3; UN 1993; Packing Group III |
| IATA (Air) | Class 3; UN 1993; Packing Group III |
| Marine Pollutant | No |
| Transport Label | Class 3 (Flammable Liquid) |
| Transport Temperature | Ambient temperature; protect from heat and ignition sources |
SECTION 19: REGULATORY STATUS
| Region / Authority | Status |
|---|---|
| USA (EPA) | Approved as water treatment chemical |
| European Union (EC) | REACH registered; Approved as industrial chemical |
| Turkey | Approved as industrial chemical; Subject to KKDIK regulation |
| ECHA (REACH) | Registered substance |
| TSCA (USA) | Listed |
| California (Prop 65) | Not listed |
| Halal / Kosher / Vegan | Yes (synthetic, not animal-derived) |
SECTION 20: OTHER NAMES AND SYNONYMS
| Type | Name |
|---|---|
| Turkish Names | Dietilhidroksilamin, DEHA |
| English Names | Diethylhydroxylamine, N,N-Diethylhydroxylamine, DEHA |
| CAS Number | 3710-84-7 |
| EC Number | 223-055-4 |
| PubChem CID | 19640 |
| HS Code | 2928.00 |
SECTION 21: SUMMARY TABLE
| Property | Value |
|---|---|
| CAS Number | 3710-84-7 |
| Molecular Formula | C₄H₁₁NO |
| Molecular Weight | 89.14 g/mol |
| Appearance | Colorless to light yellow liquid |
| Purity | ≥ 85% |
| Flash Point | ~45-50°C |
| Solubility in Water | Completely soluble |
| Primary Function | Oxygen scavenger, corrosion inhibitor, polymerization inhibitor |
| Main Application Areas | Boiler water treatment, polymer production, antioxidant |
| Shelf Life | 12 months |
| Storage | Cool (15-25°C), dry, airtight |
| GHS Signal Word | Warning |
| UN Number | 1993 |
| Hazard Class | Class 3 (Flammable Liquid) |
SECTION 22: CRITICAL WARNINGS AND BEST PRACTICES
CRITICAL WARNINGS:
Flammable Liquid: Flash point is ~45-50°C. Keep away from heat, sparks, and flames.
Alternative to Hydrazine: DEHA is significantly safer than hydrazine and at least as effective as an oxygen scavenger.
Conductivity Advantage: Does not increase water conductivity after reaction. This is a major advantage for high-pressure boilers.
Vapor Phase Protection: Due to its volatile structure, it provides protection not only in the liquid phase but also in steam and condensate lines.
Oxygen Scavenging: Approximately 3 ppm DEHA is required for 1 ppm O₂. Continuous dosing is recommended.
pH Compatibility: Compatible in pH ≥ 7 systems. Effectiveness decreases in acidic environments.
Temperature: Effective up to 300°C; decomposition may occur at higher temperatures.
BEST PRACTICE RECOMMENDATIONS:
Dosing (Boiler Water): Adjust dosage according to dissolved oxygen concentration (typical 1:3 DEHA:O₂ ratio). Continuous dosing (to feed water line) is recommended.
Storage: Store in a cool (15-25°C), dry, well-ventilated area in tightly closed containers. Protect from light and air.
Transport: UN 1993, Class 3, Packing Group III. Keep away from ignition sources.
Personal Protective Equipment: Use nitrile gloves, safety goggles, protective clothing, and organic vapor filter for vapor exposure.
Hygiene: Wash hands thoroughly after handling; do not eat, drink or smoke while using.
Quality Control: Regular testing for purity (titration/GC), moisture content (Karl Fischer), diethylamine content (GC), and color (Pt/Co) should be performed.
Spill Response: Collect with absorbent material; prevent entry into sewers or waterways. Ensure adequate ventilation.
Disposal: Dispose of in accordance with local, regional, and national regulations. May be considered hazardous waste.
Polymerization Inhibitor: Use at 50-500 ppm concentration in vinyl monomers. Removes during distillation due to volatility.
LEGAL DISCLAIMER:
The information provided in this document is based on our current knowledge and experience and is presented in good faith; however, it does not constitute a binding specification or warranty as all conditions of use are beyond our control. This Technical Data Sheet is for informational purposes only. Users are responsible for testing suitability for their own applications. For complete safety, storage, use, transport, waste, and regulatory compliance information, please refer to the official Safety Data Sheet (SDS/MSDS) provided by the manufacturer/supplier. DEHA is a flammable liquid; keep away from heat, sparks, and flames.