Difference between revisions of "Silver formate"

From Sciencemadness Wiki
Jump to: navigation, search
(Created page with "{{Chembox | Name = Silver formate | Reference = | IUPACName = Silver formate | PIN = | SystematicName = | OtherNames = Silver methanoate<br>Silver(I) formate <!-- Images --> |...")
 
 
Line 52: Line 52:
 
| BoilingPt_ref =  
 
| BoilingPt_ref =  
 
| BoilingPt_notes = Decomposes
 
| BoilingPt_notes = Decomposes
| Density = 4.25 g/cm<sup>3</sup><ref name="puzan">[https://www.sciencedirect.com/science/article/abs/pii/S0022459616304601 Anna N. Puzan, Vyacheslav N. Baumer, Pavel V. Mateychenko, Journal of Solid State Chemistry Volume 246, February 2017, Pages 264-268, "Structure and decomposition of the silver formate Ag(HCO2)"]</ref>
+
| Density = 4.25 g/cm<sup>3</sup> (20 °C)<ref name="puzan">[https://www.sciencedirect.com/science/article/abs/pii/S0022459616304601 Anna N. Puzan, Vyacheslav N. Baumer, Pavel V. Mateychenko, Journal of Solid State Chemistry Volume 246, February 2017, Pages 264-268, "Structure and decomposition of the silver formate Ag(HCO2)"]</ref>
 
| Formula = CHO<sub>2</sub>Ag<br>HCOOAg
 
| Formula = CHO<sub>2</sub>Ag<br>HCOOAg
 
| HenryConstant =  
 
| HenryConstant =  
Line 122: Line 122:
  
 
===Explosive===
 
===Explosive===
Silver formate has been known to explode upon heating above 95 C. It's claimed that it can detonate spontaneous at standard conditions, with some claims that it can even detonate in the presence of moisture.<ref>Kendall, J.; Adler, H.; Journal of the American Chemical Society; vol. 43; (1921); p. 1470 - 1481</ref> or upon drying.<ref>Koeroesy; Nature; vol. 160; (1947); p. 21</ref><ref>https://patents.google.com/patent/US2630444A/en</ref>
+
Silver formate has been known to explode upon heating above 95 °C. It's claimed that it can detonate spontaneous at standard conditions, with some claims that it can even detonate in the presence of moisture.<ref>Kendall, J.; Adler, H.; Journal of the American Chemical Society; vol. 43; (1921); p. 1470 - 1481</ref> or upon drying.<ref>Koeroesy; Nature; vol. 160; (1947); p. 21</ref><ref>https://patents.google.com/patent/US2630444A/en</ref>
  
 
==Availability==
 
==Availability==

Latest revision as of 17:36, 30 December 2023

Silver formate
Names
IUPAC name
Silver formate
Other names
Silver methanoate
Silver(I) formate
Properties
CHO2Ag
HCOOAg
Molar mass 152.886 g/mol
Appearance Colorless white solid
Odor Odorless
Density 4.25 g/cm3 (20 °C)[1]
Melting point 95 °C (203 °F; 368 K) (decomposes)
Boiling point Decomposes
Insoluble
Solubility Reacts with haloacids
Insoluble in organic solvents
Vapor pressure ~0 mmHg
Thermochemistry
350 kJ/mol[2]
Hazards
Safety data sheet None
Flash point Detonates
Related compounds
Related compounds
Silver acetate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Silver formate is an unstable chemical compound, a salt of silver and formic acid. It has the formula HCOOAg.

Properties

Chemical

Silver formate is unstable and sensitive to light and will detonate upon heating, releasing silver nanoparticles, as well as carbon dioxide and hydrogen:[1]

HCOOAg → Ag + CO2 + ½ H2

According to the source above, it can even detonate at standard conditions, upon standing in open air.

Physical

Silver formate is a colorless solid, insoluble in water and organic solvents.

Explosive

Silver formate has been known to explode upon heating above 95 °C. It's claimed that it can detonate spontaneous at standard conditions, with some claims that it can even detonate in the presence of moisture.[3] or upon drying.[4][5]

Availability

Silver formate is not sold by suppliers.

Preparation

Silver formate can be obtained by reacting [silver nitrate]] with ammonium formate.

AgNO3 + HCOONH4 → HCOOAg + NH4NO3

Alternatively, it can be obtained by reacting silver oxide[6][7] or silver carbonate[8] with formic acid, in aq. solution:

Ag2O + 2 HCOOH → 2 HCOOAg + H2O
Ag2CO3 + 2 HCOOH → 2 HCOOAg + H2O + CO2

Projects

  • Pyrotechnic demonstration
  • Make silver nanoparticles

Handling

Safety

Silver formate is unstable and may detonate under strong heating or mechanical shock. It has been documented that it may spontaneously decompose violently even upon sitting.

Storage

Should not be stored for too long.

Disposal

Safe destruction of this compound can be done by heating it under water. The resulting Ag particles from its decomposition should be recycled.

Like most silver salts, strong light will break down this compound.

References

  1. 1.0 1.1 Anna N. Puzan, Vyacheslav N. Baumer, Pavel V. Mateychenko, Journal of Solid State Chemistry Volume 246, February 2017, Pages 264-268, "Structure and decomposition of the silver formate Ag(HCO2)"
  2. Sakiyama, Minoru; Murata, Shigeo; Bulletin of the Chemical Society of Japan; vol. 57; nb. 5; (1984); p. 1174 - 1178
  3. Kendall, J.; Adler, H.; Journal of the American Chemical Society; vol. 43; (1921); p. 1470 - 1481
  4. Koeroesy; Nature; vol. 160; (1947); p. 21
  5. https://patents.google.com/patent/US2630444A/en
  6. https://patentimages.storage.googleapis.com/94/16/72/eefa3f05f34d51/US2630444.pdf
  7. Gmelin Handbuch der Anorganischen Chemie; vol. Ag: MVol.B5; 2.1, page 120 - 121
  8. Oshima, Masato; Sakamoto, Toshiaki; Maruyama, Yooichiroh; Ozawa, Fumiyuki; Shimizu, Isao; Yamamoto, Akio; Bulletin of the Chemical Society of Japan; vol. 73; nb. 2; (2000); p. 453 - 464

Relevant Sciencemadness threads