Ammonium dichromate is an inorganic compound with the chemical formula (NHfour)twoCrtwoOseven, orange yellow crystalline powder, easily soluble in water and ethanol, insoluble in acetone.Used as organic synthesis catalyst, mordant, developer, etc.
Listed in the List of Explosive Hazardous Chemicals[2]，It shall be controlled in accordance with the Public Security Management Measures for Explosive Hazardous Chemicals[3]。
Reference value for drainage parameter calculation (XlogP): None
Number of hydrogen bond donors: 2
Number of hydrogen bond receptors: 7
Number of rotatable chemical bonds: 0
Number of tautomers: 0
Topological molecule polar surface area (TPSA): 126
Number of heavy atoms: 11
Surface charge: 0
Complexity: 194
Number of isotope atoms: 0
Determine the number of atomic structure centers: 0
Number of uncertain atomic structure centers: 0
Determine the number of chemical bond structure centers: 0
Number of uncertain chemical bond structure centers: 0[1]
application area
Announce
edit
1. Used for the determination of barium.Used as a catalyst.Mordant, oxidant and raw material for producing pure nitrogen in laboratory.Smokeless fireworks manufacturing.
2. It is mainly used for photoengraving, developing solution preparation and lithographic development of intaglio printing.It is used to manufacture ceramic glaze and fireworks.It is the raw material for producing pure nitrogen and sodium dodecyl sulfonate.
3. It is used as a catalyst for the synthesis of perfume, and the production of dodecanol and tetradecanol from coconut oil.It is used as a mordant for acid dyes and mordant dyes in the printing and dyeing industry.It is also used as a foaming agent for plastics and rubber.
4. Ammonium dichromate can be used for passivation and phosphating of aluminum and alloys, as well as passivation of other metals.Ammonium dichromate is photosensitive. Under the action of ultraviolet light, hexavalent chromium is reduced to trivalent chromium and interacts with water-soluble polymers (PVA, gelatin, bone glue or other protein gums) to generate insoluble cross-linked substances.According to this characteristic, ammonium dichromate has been widely used in the production of screen printing.
First aid measures
Announce
edit
Skin contact: Take off the contaminated clothes and wash the skin thoroughly with soapy water and clean water.
Eye contact: Lift the eyelid and flush with flowing water or physiological saline.Get medical attention.
Inhalation: quickly leave the site to a place with fresh air.Keep the respiratory tract unobstructed.If breathing is difficult, give oxygen.If breathing stops, perform artificial respiration immediately.Get medical attention.
Ingestion: Rinse mouth with water, and wash stomach with clear water or 1% sodium thiosulfate solution.Drink milk or egg white.Get medical attention.
Fire fighting measures
Announce
edit
Hazardous characteristics: strong oxidant.It can form explosive mixture when mixed with reducing agent, organic matter, flammable substances such as sulfur, phosphorus or metal powder.Contact with strong acid will cause spontaneous combustion.React violently in contact with nitrate and chlorate.
Hazardous combustion products: nitrogen oxides.
Fire extinguishing method: use fog water and sand to extinguish the fire.
Leakage emergency treatment
Announce
edit
Isolate the leakage contaminated area and restrict access.It is recommended that emergency personnel wear dust masks (full face masks) and gas suits.Do not allow the leakage to come into contact with reducing agent, organic matter, inflammables or metal powder.
Small amount of leakage: cover with dry sand or lime.
Large amount of leakage: collect and recycle or transport to waste disposal site for disposal.
Handling storage
Announce
edit
Precautions for operation: close operation and strengthen ventilation.Operators must be specially trained and strictly abide by the operating procedures.It is recommended that operators wear hood type electric air supply filter type dust respirator, polyethylene gas suit and rubber gloves.Keep away from kindling and heat sources, and smoking is strictly prohibited in the workplace.Keep away from flammable and combustible materials.Avoid dust generation.Avoid contact with reducing agent.Load and unload gently during transportation to prevent damage to packaging and containers.Fire fighting equipment and leakage emergency treatment equipment of corresponding types and quantities shall be provided.Empty containers may leave harmful substances.
Precautions for storage: store in a cool and ventilated warehouse.Keep away from kindling and heat sources.Packing and sealing.It shall be stored separately from combustible (combustible) materials and reducing agents, and mixed storage is strictly prohibited.The storage area shall be equipped with appropriate materials to contain leakage.
security information
Announce
edit
Safety terminology
S45：In case of accident or if you feel unwell, seek medical advice immediately (show the lable where possible).
In case of an accident or feeling unwell, seek medical advice immediately (show the label if possible).
S53：Avoid exposure - obtain special instructions before use.
Avoid contact and obtain special instructions before use.
S60：This material and/or its container must be disposed of as hazardous waste.
The substance and its container must be disposed of as hazardous waste.
S61：Avoid release to the environment. Refer to special instructions/Safety data sheets.
Avoid releasing into the environment, refer to special instructions/safety receipt instructions.
Risk terminology
R2：Risk of explosion by shock, friction, fire or other sources of ignition.
Explosion hazard due to shock, friction, fire or other ignition sources.
R8：Contact with combustible material may cause fire.
Contact with combustible materials may cause fire.
R21：Harmful in contact with skin.
Contact with skin is harmful.
R25：Toxic if swallowed.
Toxic if swallowed.
R26：Very toxic by inhalation.
Very toxic by inhalation.
R34：Causes burns.
Causes burns.
R42/43：May cause sensitization by inhalation and skin contact.
May cause allergy by inhalation and skin contact.
R45：May cause cancer.
May cause cancer.
R46：May cause heritable genetic damage.
It may cause irreversible genetic damage.
R48/23：Toxic : danger of serious damage to health by prolonged exposure through inhalation and in contact with skin.
Toxic: danger of serious damage to health through inhalation and long-term contact with skin.
R50/53：Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
It is extremely toxic to aquatic organisms and may cause long-term adverse effects in the aquatic environment.
R60：May impair fertility.
May impair fertility.
R61：May cause harm to the unborn child.
May cause harm to unborn babies.
Hazard category
Announce
edit
Oxidizing solid, class 2 *;
Acute toxicity - oral, category 3 *;
Acute toxicity - inhalation, category 2 *;
Skin corrosion/irritation, Category 1B;
Serious eye injury/eye irritation, category 1;
Respiratory sensitizer, category 1;
Skin sensitizer, category 1;
Germ cell mutagenicity, category 1B;
Carcinogenicity, category 1A;
Reproductive toxicity, category 1B;
Specific target organ toxicity - one exposure, category 3;
(Respiratory tract irritation) specific target organ toxicity - repeated exposure, category 1;
