Picrite (the explosive)
Nitroguanidine
CAS: 556-88-7
Molecular Formula: CH4N4O2
Picrite (the explosive) - Names and Identifiers
| Name | Nitroguanidine |
| Synonyms | Picrite Nitroguanidine a-Nitroguanidine 1-Nitroguanidine N1-Nitroguanidine N''-Nitroguanidine nitroguanidine,wet Nitroguanidine, wet guanidine, N-nitro- Guanidine, 1-nitro- nitroguanidine,[dry] Picrite (the explosive) |
| CAS | 556-88-7 |
| EINECS | 209-143-5 |
| InChI | InChI=1/CH4N4O2/c2-1(3)4-5(6)7/h(H4,2,3,4) |
Picrite (the explosive) - Physico-chemical Properties
| Molecular Formula | CH4N4O2 |
| Molar Mass | 104.07 |
| Density | 1.55g/cm3 |
| Melting Point | 239 °C (dec.) (lit.) |
| Boling Point | 195.15°C (rough estimate) |
| Flash Point | 86.5°C |
| Water Solubility | 3 g/L (20 ºC) |
| Vapor Presure | 0Pa at 20℃ |
| Merck | 14,6607 |
| BRN | 1756640 |
| pKa | 3.45±0.50(Predicted) |
| Refractive Index | 1.6850 (estimate) |
| Physical and Chemical Properties | White crystals. Slightly soluble in water, soluble in hot water, sulfuric acid and nitric acid, little solubility in general organic solvents, slightly soluble in methanol and acetone, soluble in dimethyl sulfoxide and dimethyl formamide. |
Picrite (the explosive) - Risk and Safety
| Risk Codes | R11 - Highly Flammable R36/37/38 - Irritating to eyes, respiratory system and skin. R5 - Heating may cause an explosion |
| Safety Description | S16 - Keep away from sources of ignition. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S33 - Take precautionary measures against static discharges. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S47 - Keep at temperature not exceeding... S37/39 - Wear suitable gloves and eye/face protection |
| UN IDs | UN 1336 4.1/PG 1 |
| WGK Germany | 1 |
| RTECS | MF4600000 |
| Hazard Class | 1.1D |
| Packing Group | I |
Picrite (the explosive) - Nature
Open Data Verified Data
White needle-like crystals, non-hygroscopic. Insoluble in cold water, soluble in hot water, ethanol-soluble, soluble in alkali. This product is explosive without flash and smoke. Relative density: 1. 715; Melting Point: 232 ℃; Deflagration point: 275 ℃; Detonation gas volume: 895 L/kg, heat of explosion: 3724kj/kg; Formation energy:- 774kj/kg; Oxygen balance:-30. 7%. Impact sensitivity; No response at 49N.m. In case of open flame, high temperature and strong vibration, prone to explosion, thermal decomposition of toxic gases, and oxidative substances can react strongly.
Last Update：2025-06-10 22:55:16
Picrite (the explosive) - Application
Open Data Verified Data
is an important component of nitrocellulose propellant, nitrocellulose propellant and diethylene glycol dinitrate admixture, solid rocket propellant.
Last Update：2025-08-19 16:24:40
Picrite (the explosive) - Safety
Open Data Verified Data
It has a strong stimulating effect on eyes, skin, mucous membrane and upper respiratory tract. By high heat decomposition, release of toxic nitrogen oxides. This product is explosive, flammable, should be away from the fire, heat source. Protection from direct sunlight. Light load and light unloading. Vibration, impact and friction are prohibited.
Last Update：2025-06-10 22:55:16
Picrite (the explosive) - Reference Information
| LogP | -0.815 at 20℃ |
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| Use | Used as an explosive This product is an organic synthetic raw material. It is used as an intermediate of imidacloprid and acetamiprid on pesticides to synthesize the next intermediate N-Nitroimidazolidine, in addition, it can be reduced to aminoguanidine, used to synthesize angina pectoris drug Le Kean, etc., and can also be used for the preparation of explosives and smokeless water. Used in organic synthesis, preparation of aminoguanidine, drug Le Kean, etc. It can also be used for the preparation of explosives and smokeless gunpowder. Pesticides, pharmaceutical intermediates, automobile airbags |
| Production method | It is obtained by reacting nitric acid at 20°C in the presence of sulfuric acid. Under the condition of cooling and stirring, the guanidine nitrate is slowly added to concentrated sulfuric acid in a small amount, and the reaction temperature does not exceed 20 ℃. Add it, place it, and pour it into ice water to precipitate nitroguanidine. Then filter, wash away the acid with water, and then recrystallize from boiling water to obtain the finished product. The yield is over 70%. The preparation method is that guanidine nitrate is dehydrated in the presence of concentrated sulfuric acid to form nitroguanidine. 280g guanidine nitrate is slowly added into 250mL of pre-cooled concentrated sulfuric acid (relative density is 1.84) under stirring. During the addition process, the reaction temperature is strictly controlled below 20 ℃. After all the guanidine nitrate is added, it is stirred intermittently until it is uniform and crystal-free. Then pour into a mixture of crushed ice and water, fully stir and filter, wash the water until neutral, and then recrystallize to obtain nitroguanidine. |
| category | explosives |
| toxicity classification | poisoning |
| acute toxicity | oral-rat LD50:10200 mg/kg; Oral-mouse LD50: 3850 mg/kg |
| explosive hazard characteristics | high heat, vibration, impact, friction can explode |
| flammability hazard characteristics | flammable solids; thermal decomposition of toxic nitrogen oxide gas |
| storage and transportation characteristics | light and light; the warehouse is ventilated, away from open flames, high temperature, and sunlight; separate from oxidants and combustibles |
| fire extinguishing agent | mist water, foam |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 20:49:11
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