Home > asym-Dimethylhydrazine > asym-Dimethylhydrazine(57-14-7)
asym-Dimethylhydrazine(57-14-7)
Product Identification
Physical and Chemical Properties
First Aid Measures
Handling and Storage
Hazards Identification
Exposure Controls/Personal Protection
Fire Fighting Measures
Accidental Release Measures
Stability and Reactivity
Transport Information
Product Identification
Product Name
asym-Dimethylhydrazine
asym-Dimethylhydrazine
Synonyms
Dimazine
Iron arsenate
N,N-Dimethylhydrazine
Scorodite
UDMH
Unsymetrical dimethyl hydrazine
Dimazine
Iron arsenate
N,N-Dimethylhydrazine
Scorodite
UDMH
Unsymetrical dimethyl hydrazine
CAS
10102-49-5
10102-49-5
CAS
57-14-7
57-14-7
Formula
C2H8N2
C2H8N2
Formula
AsFeO4
AsFeO4
Molecular Weight
60.1
60.1
Molecular Weight
194.77
194.77
EINECS
200-316-0
200-316-0
EINECS
233-274-7
233-274-7
RTECS
MV2450000
MV2450000
RTECS
NO4585000
NO4585000
RTECS Class
Other
Other
RTECS Class
Tumorigen; Mutagen; Reproductive Effector; Human Data
Tumorigen; Mutagen; Reproductive Effector; Human Data
Merck
13,3273
13,3273
Beilstein/Gmelin
57147 (G)
57147 (G)
Beilstein/Gmelin
605261
605261
Beilstein Reference
4-04-00-03322
4-04-00-03322
EC Index Number
007-012-00-5
007-012-00-5
EC Class
Highly flammable; Carcinogenic Category 2; Toxic; Corrosive; Dangerous for the Environment
Highly flammable; Carcinogenic Category 2; Toxic; Corrosive; Dangerous for the Environment
Physical and Chemical Properties
Appearance
Ferric arsenate is a green or brown powder.
Ferric arsenate is a green or brown powder.
Appearance
Fuming colorless liquid, gradually turns yellow in air, hygroscopic, ammonia or fish-like odor.
Fuming colorless liquid, gradually turns yellow in air, hygroscopic, ammonia or fish-like odor.
Solubility in water
Very soluble
Very soluble
Melting Point
830
830
Melting Point
-58
-58
Boiling Point
63
63
Vapor Pressure
157
157
Density
0.801 g/cm3 (11 C)
0.801 g/cm3 (11 C)
Density
4.32 g/cm3
4.32 g/cm3
pKa/pKb
6.79 (pKb)
6.79 (pKb)
Heat Of Vaporization
32.6 kJ/mol
32.6 kJ/mol
Heat Of Combustion
-1979 kJ/mol
-1979 kJ/mol
Usage
Insecticide dihydrate.
Insecticide dihydrate.
Usage
The base in rocket fuel formulations.
The base in rocket fuel formulations.
Saturation Concentration
136000 ppm (13.6%) at 20 C (calculated)
136000 ppm (13.6%) at 20 C (calculated)
Vapor Density
1.94
1.94
Odor threshold
12.0 mg/m3
12.0 mg/m3
Refractive Index
1.0001
1.0001
First Aid Measures
Ingestion
Acute toxicity results in early symptoms of abdominal pain, severe vomiting and diarrhea, as well as dryness of the oral and nasal cavities.
Acute toxicity results in early symptoms of abdominal pain, severe vomiting and diarrhea, as well as dryness of the oral and nasal cavities.
Ingestion
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
Ingestion
Gastric decontamination - aggressive decontamination with gastric lavage is recommended. Activated charcoal: administer charcoal as a slurry (240 ml water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents.
Gastric decontamination - aggressive decontamination with gastric lavage is recommended. Activated charcoal: administer charcoal as a slurry (240 ml water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents.
Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration.
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration.
Inhalation
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult.
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult.
Inhalation
Respiratory tract irritation may occur. Cardiogenic or noncardiogenic pulmonary edema and respiratory failure may develop in severe poisonings.
Respiratory tract irritation may occur. Cardiogenic or noncardiogenic pulmonary edema and respiratory failure may develop in severe poisonings.
Skin
Skin findings may include hyperpigmentation, keratoses, and epidermoid carcinomas. Mee's lines of the nails are common. Trivalent arsenic compounds are corrosive to the skin. Arsenic trioxide and pentoxide are sensitizers.
Skin findings may include hyperpigmentation, keratoses, and epidermoid carcinomas. Mee's lines of the nails are common. Trivalent arsenic compounds are corrosive to the skin. Arsenic trioxide and pentoxide are sensitizers.
Skin
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Destroy contaminated shoes.
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Destroy contaminated shoes.
Skin
Remove and isolate contaminated clothing and shoes. Remove material from skin immediately. Immediately flush with running water for at least 20 minutes. For minor skin contact, avoid spreading material on unaffected skin.
Remove and isolate contaminated clothing and shoes. Remove material from skin immediately. Immediately flush with running water for at least 20 minutes. For minor skin contact, avoid spreading material on unaffected skin.
Eyes
Immediately flush with running water for at least 20 minutes.
Immediately flush with running water for at least 20 minutes.
Eyes
Get medical aid immediately. Do NOT allow victim to rub or keep eyes closed. Extensive irrigation is required (at least 30 minutes).
Get medical aid immediately. Do NOT allow victim to rub or keep eyes closed. Extensive irrigation is required (at least 30 minutes).
Eyes
As(III) is corrosive to the eyes, mouth, and mucous membranes. Perforation of the nasal septum can occur.
As(III) is corrosive to the eyes, mouth, and mucous membranes. Perforation of the nasal septum can occur.
Handling and Storage
Storage
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Keep container closed when not in use. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Refrigerator/flammables.
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Keep container closed when not in use. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Refrigerator/flammables.
Storage
Protect container against physical damage. Store in well ventilated area away from food or food products and combustible materials.
Protect container against physical damage. Store in well ventilated area away from food or food products and combustible materials.
Handling
Wash thoroughly after handling. Use only in a well ventilated area. Ground and bond containers when transferring material. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Avoid contact with heat, sparks and flame. Do not get on skin or in eyes. Avoid ingestion and inhalation. Discard contaminated shoes. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
Wash thoroughly after handling. Use only in a well ventilated area. Ground and bond containers when transferring material. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Avoid contact with heat, sparks and flame. Do not get on skin or in eyes. Avoid ingestion and inhalation. Discard contaminated shoes. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Hazards Identification
Inhalation
Harmful if inhaled. Causes chemical burns to the respiratory tract. Exposure produces central nervous system depression. Vapors may cause dizziness or suffocation.
Harmful if inhaled. Causes chemical burns to the respiratory tract. Exposure produces central nervous system depression. Vapors may cause dizziness or suffocation.
Skin
Causes skin burns. May be harmful if absorbed through the skin.
Causes skin burns. May be harmful if absorbed through the skin.
Eyes
Causes eye burns. May result in corneal injury.
Causes eye burns. May result in corneal injury.
Ingestion
Harmful if swallowed. May cause severe and permanent damage to the digestive tract. Causes gastrointestinal tract burns. May cause liver damage.
Harmful if swallowed. May cause severe and permanent damage to the digestive tract. Causes gastrointestinal tract burns. May cause liver damage.
Hazards
Containers may explode when heated. Runoff may pollute waterways.
Containers may explode when heated. Runoff may pollute waterways.
Hazards
Vapor may explode if ignited in an enclosed area. Vapors may travel to a source of ignition and flashback. Runoff to sewer may create fire or explosion hazard. When it decomposes, 1,1-dimethylhydrazine gives off toxic nitrogen compound fumes. Dissolves, swells, and disintegrates many plastics. Dangerous when exposed to heat, flame, or oxidizers. Hazardous polymerization may not occur.
Vapor may explode if ignited in an enclosed area. Vapors may travel to a source of ignition and flashback. Runoff to sewer may create fire or explosion hazard. When it decomposes, 1,1-dimethylhydrazine gives off toxic nitrogen compound fumes. Dissolves, swells, and disintegrates many plastics. Dangerous when exposed to heat, flame, or oxidizers. Hazardous polymerization may not occur.
EC Risk Phrase
R 45 11 23/25 34 51/53
R 45 11 23/25 34 51/53
EC Safety Phrase
S 53 45 61
S 53 45 61
UN (DOT)
1163
1163
UN (DOT)
1606
1606
Exposure Controls/Personal Protection
Personal Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Personal Protection
Wear appropriate clothing to prevent any reasonable probability of skin contact. Wear eye protection to prevent any possibility of eye contact.
Wear appropriate clothing to prevent any reasonable probability of skin contact. Wear eye protection to prevent any possibility of eye contact.
Respirators
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use. Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use. Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Respirators
Any self contained breathing apparatus with a full facepiece and operated in a pressure demand or other positive pressure mode or any supplied air respirator with a full facepiece and operated in a pressure demand or other positive pressure mode in combination with an auxiliary self contained breathing apparatus operated in pressure demand or other positive pressure mode.
Any self contained breathing apparatus with a full facepiece and operated in a pressure demand or other positive pressure mode or any supplied air respirator with a full facepiece and operated in a pressure demand or other positive pressure mode in combination with an auxiliary self contained breathing apparatus operated in pressure demand or other positive pressure mode.
Exposure Effects
Abnormally low blood pressure and rapid heart rate are common early signs. Fever and rapid breathing may occur. Elevated blood pressure has been associated with chronic environmental arsenic exposure. Altered mental status, seizures, toxic delirium, encephalopathy, and delayed peripheral neuropathy are complications of acute arsenic poisoning. Inorganic arsenic crosses the placenta and may result in spontaneous abortion or stillbirth with either acute or chronic poisoning.
Abnormally low blood pressure and rapid heart rate are common early signs. Fever and rapid breathing may occur. Elevated blood pressure has been associated with chronic environmental arsenic exposure. Altered mental status, seizures, toxic delirium, encephalopathy, and delayed peripheral neuropathy are complications of acute arsenic poisoning. Inorganic arsenic crosses the placenta and may result in spontaneous abortion or stillbirth with either acute or chronic poisoning.
Exposure Effects
Possible cancer hazard based on tests with laboratory animals. Chronic exposure may cause liver damage.
Possible cancer hazard based on tests with laboratory animals. Chronic exposure may cause liver damage.
Exposure limit(s)
OSHA PEL: 1910.1018 TWA 0.010 mg/m3 NIOSH REL: Ca C 0.002 mg/m3 15-minute See Appendix A NIOSH IDLH: Potential occupational carcinogen 5 mg/m3 (as As)
OSHA PEL: 1910.1018 TWA 0.010 mg/m3 NIOSH REL: Ca C 0.002 mg/m3 15-minute See Appendix A NIOSH IDLH: Potential occupational carcinogen 5 mg/m3 (as As)
Exposure limit(s)
OSHA PEL: TWA 0.5 ppm (1 mg/m3) skin NIOSH REL: Ca C 0.06 ppm (0.15 mg/m3) 2-hr See Appendix A NIOSH IDLH: Potential occupational carcinogen 15 ppm
OSHA PEL: TWA 0.5 ppm (1 mg/m3) skin NIOSH REL: Ca C 0.06 ppm (0.15 mg/m3) 2-hr See Appendix A NIOSH IDLH: Potential occupational carcinogen 15 ppm
Poison Class
1*
1*
Fire Fighting Measures
Flash Point
1
1
Autoignition
249
249
Fire Fighting
Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Use water in flooding quantities as fog. Use foam, dry chemical, or carbon dioxide.
Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Use water in flooding quantities as fog. Use foam, dry chemical, or carbon dioxide.
Fire Fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Use water spray to keep fire-exposed containers cool. Containers may explode in the heat of a fire. Will be easily ignited by heat, sparks or flame. Extinguishing media: For small fires, use dry chemical, carbon dioxide, water spray or alcohol-resistant foam. For large fires, use water spray, fog, or alcohol-resistant foam. Use water spray to cool fire-exposed containers. Water may be ineffective. Do NOT use straight streams of water.
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Use water spray to keep fire-exposed containers cool. Containers may explode in the heat of a fire. Will be easily ignited by heat, sparks or flame. Extinguishing media: For small fires, use dry chemical, carbon dioxide, water spray or alcohol-resistant foam. For large fires, use water spray, fog, or alcohol-resistant foam. Use water spray to cool fire-exposed containers. Water may be ineffective. Do NOT use straight streams of water.
Upper exp. limit
45
45
Lower exp. limit
2
2
Fire Potential
Ferric arsenate itself does not burn or burns with difficulty.
Ferric arsenate itself does not burn or burns with difficulty.
Fire Potential
Quite flammable. Easily ignited. The mixture with hydrazine.
Quite flammable. Easily ignited. The mixture with hydrazine.
Accidental Release Measures
Small spills/leaks
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Clean up spills immediately, using the appropriate protective equipment. Remove all sources of ignition. Use a spark-proof tool. Provide ventilation. A vapor suppressing foam may be used to reduce vapors.
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Clean up spills immediately, using the appropriate protective equipment. Remove all sources of ignition. Use a spark-proof tool. Provide ventilation. A vapor suppressing foam may be used to reduce vapors.
Small spills/leaks
Keep material out of water sources and sewers.
Keep material out of water sources and sewers.
Stability and Reactivity
Disposal Code
9
9
Incompatibilities
Halogens, mercury, strong acids, strong oxidizing agents, rubber, plastics.
Halogens, mercury, strong acids, strong oxidizing agents, rubber, plastics.
Stability
No data.
No data.
Stability
Stable under normal temperatures and pressures.
Stable under normal temperatures and pressures.
Incompatibilities
When water soln of arsenicals are in contact with active metals such as arsenic, iron, aluminum, zinc, highly toxic fumes of arsenic including arsine are released.
When water soln of arsenicals are in contact with active metals such as arsenic, iron, aluminum, zinc, highly toxic fumes of arsenic including arsine are released.
Decomposition
Nitrogen oxides, carbon monoxide, irritating and toxic fumes and gases, carbon dioxide, nitrogen.
Nitrogen oxides, carbon monoxide, irritating and toxic fumes and gases, carbon dioxide, nitrogen.
Decomposition
Dangerous when heated to decomposition, emits toxic fumes of arsenic including arsine.
Dangerous when heated to decomposition, emits toxic fumes of arsenic including arsine.
Combustion Products
Toxic oxides of nitrogen are produced during combustion of this material.
Toxic oxides of nitrogen are produced during combustion of this material.
Combustion Products
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.
Transport Information
UN Number
1163
1163
UN Number
1606
1606
Hazard Class
6.1
6.1
Packing Group
I
I
Packing Group
II
II
HS Code
2928 00 90
2928 00 90