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Scandium oxalate

Scandium oxalate compounds

Scandium oxalate is scandium oxalate Compound, chemical formula Sc two (C two O four ) three It is white crystal in appearance, soluble in water and hydrochloric acid. May be determined by oxalate And Scandium chloride Reaction. It can be decomposed into Scandium trioxide And carbon dioxide 。 Accessible ammonia The reaction will generate oxalic acid VI Scandium ammoniate.^[5] The main hydrates are scandium oxalate hexahydrate and scandium oxalate pentahydrate, which are basically used for scientific research.

Chinese name: Scandium oxalate
Foreign name: Scandium Oxalate^[2]
Alias: Scandium oxalate
chemical formula: Sc two (C two O four ) three
molecular weight: two hundred and sixty-nine point nine three nine^[1]
CAS login number: 17926-77-1^[4]

Melting point: 500 ℃
Water solubility: Slightly soluble in water^[6]
Appearance: White crystal
Application: Basically used for scientific research
Security description: Xi
Hazard description: R36、R37、R38^[2]
Hazard statement: H315、H319、H335

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nine stability

Preparation method

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Heat the dilute scandium chloride aqueous solution to 60 ℃, treat it with excess dilute oxalic acid aqueous solution, and after 20min, shiny white crystals will be separated. Filtration products are stored without water calcium chloride Two days later, a fine powder is obtained, which is a hexahydrate compound.

Chemical equation: 2ScCl three +3H two C two O 4＝ Sc two (C two O four ) three +6HCl^[3]

Correlation equation

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The chemical equation for the decomposition of scandium oxalate by burning in air:

2Sc two (C two O four ) three +3O2=(burning)=2Sc two O three +12CO two

application area

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At present, the substance is basically only used in scientific research.

Calculate chemical data

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1. Reference value for drainage parameter calculation (XlogP): None available

2. Number of hydrogen bond donors: 1

3. Number of hydrogen bond receptors: 13

4. Number of rotatable chemical bonds: 0

5. Topological molecule polar surface area (TPSA): 242

6. Number of heavy atoms: 21

7. Surface charge: 0

8. Complexity: 60.5

9. Number of isotope atoms: 0

10. Determine the number of atomic structure centers: 0

11. Number of uncertain atomic structure centers: 0

12. Determine the number of chemical bond structure centers: 0

13. Number of uncertain chemical bond structure centers: 0

14. Number of covalent bond units: 6^[1]

First aid measures

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Skin contact: wash with soap and plenty of water. Get medical attention.

Eye contact: Lift the eyelid and flush with flowing water or physiological saline. Get medical attention.

Inhalation: If inhaled, move the patient to fresh air. If you stop breathing, give artificial respiration. Get medical attention.

Ingestion: Do not feed anything from the mouth to the unconscious person. Rinse mouth with water. Get medical attention.^[1]

Fire fighting measures

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Extinguishing medium: use water mist, alcohol resistant foam, dry powder or carbon dioxide to extinguish the fire.

Special hazards from this substance or mixture: Scandium oxide 。

Construction for firefighters: wear self-contained breathing apparatus to fight fires if necessary.^[1]

security information

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Hazard statement:

H315: Causes skin irritation.

H319: Causes serious eye irritation.

H335: May cause respiratory tract irritation.

Warning statement:

prevention:

P261: Avoid inhaling dust/smoke/gas/smoke/vapor/spray

P264: Clean the skin thoroughly after operation.

P271: It can only be used outdoors or in a well ventilated place.

P280: Wear protective gloves/eye protection shield/face protection shield.

measures:

P302+P352: In case of contact with skin, wash the infected part with plenty of soap and water

P304+P340: If inhaled, move the patient to fresh air and rest in a position with smooth breathing

P305+P351+P338: In case of contact with eyes, rinse slowly and gently with water for several minutes. If wearing contact lenses, it can be easily removed

Take out the contact lens, and then continue to rinse

P312: If you feel unwell, call the poisoning control center or doctor

P321: Specific treatment (see the first aid instructions provided on this label).

P332+P313: In case of skin irritation: seek medical advice/treatment.

P337+P313: If you still feel eye irritation: seek medical advice/see a doctor. If you still feel eye irritation: seek medical advice/see a doctor

P362: Take off contaminated clothes and wash them before reuse.

Storage:

P403+P233: Store in a well ventilated place. Keep container closed.

P405: The storage place must be locked.

handle:

P501: Disposal of contents/containers to an approved waste treatment plant 。^[1]