| Product Identification | Back to Contents | 【Product Name】
asym-Dimethylhydrazine | 【Synonyms】
Dimazine
Iron arsenate
N,N-Dimethylhydrazine
Scorodite
UDMH
Unsymetrical dimethyl hydrazine | 【CAS】
10102-49-5 | 【CAS】
57-14-7 | 【Formula】
C2H8N2 | 【Formula】
AsFeO4 | 【Molecular Weight】
60.1 | 【Molecular Weight】
194.77 | 【EINECS】
200-316-0 | 【EINECS】
233-274-7 | 【RTECS】
MV2450000 | 【RTECS】
NO4585000 | 【RTECS Class】
Other | 【RTECS Class】
Tumorigen; Mutagen; Reproductive Effector; Human Data | 【Merck】
13,3273 | 【Beilstein/Gmelin】
57147 (G) | 【Beilstein/Gmelin】
605261 | 【Beilstein Reference】
4-04-00-03322 | 【EC Index Number】
007-012-00-5 | 【EC Class】
Highly flammable; Carcinogenic Category 2; Toxic; Corrosive; Dangerous for the Environment |
| Physical and Chemical Properties | Back to Contents | 【Appearance】
Ferric arsenate is a green or brown powder. | 【Appearance】
Fuming colorless liquid, gradually turns yellow in air, hygroscopic, ammonia or fish-like odor. | 【Solubility in water】
Very soluble | 【Melting Point】
830 | 【Melting Point】
-58 | 【Boiling Point】
63 | 【Vapor Pressure】
157 | 【Density】
0.801 g/cm3 (11 C) | 【Density】
4.32 g/cm3 | 【pKa/pKb】
6.79 (pKb) | 【Heat Of Vaporization】
32.6 kJ/mol | 【Heat Of Combustion】
-1979 kJ/mol | 【Usage】
Insecticide dihydrate. | 【Usage】
The base in rocket fuel formulations. | 【Saturation Concentration】
136000 ppm (13.6%) at 20 C (calculated) | 【Vapor Density】
1.94 | 【Odor threshold】
12.0 mg/m3 | 【Refractive Index】
1.0001 |
| First Aid Measures | Back to Contents | 【Ingestion】
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. | 【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. | 【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. | 【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. | 【Inhalation】
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】
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. | 【Eyes】
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). | 【Eyes】
As(III) is corrosive to the eyes, mouth, and mucous membranes. Perforation of the nasal septum can occur. |
| Handling and Storage | Back to Contents | 【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. | 【Storage】
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. | 【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. |
| Hazards Identification | Back to Contents | 【Inhalation】
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. | 【Eyes】
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. | 【Hazards】
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. | 【EC Risk Phrase】
R 45 11 23/25 34 51/53 | 【EC Safety Phrase】
S 53 45 61 | 【UN (DOT)】
1163 | 【UN (DOT)】
1606 |
| Exposure Controls/Personal Protection | Back to Contents | 【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. | 【Personal Protection】
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. | 【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. | 【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. | 【Exposure Effects】
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) | 【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 | 【Poison Class】
1* |
| Fire Fighting Measures | Back to Contents | 【Flash Point】
1 | 【Autoignition】
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. | 【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. | 【Upper exp. limit】
45 | 【Lower exp. limit】
2 | 【Fire Potential】
Ferric arsenate itself does not burn or burns with difficulty. | 【Fire Potential】
Quite flammable. Easily ignited. The mixture with hydrazine. |
| Accidental Release Measures | Back to Contents | 【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. | 【Small spills/leaks】
Keep material out of water sources and sewers. |
| Stability and Reactivity | Back to Contents | 【Disposal Code】
9 | 【Incompatibilities】
Halogens, mercury, strong acids, strong oxidizing agents, rubber, plastics. | 【Stability】
No data. | 【Stability】
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. | 【Decomposition】
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. | 【Combustion Products】
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. |
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