1B: Coinage Metals Flashcards
Occurrence of coinage metals
free or in complexes/ chelates
easily recovered from ore
metallurgy
only reddish metal
copper
degree of malleability, conductor of heat and electricity
1st: Au
2nd: Ag
3rd: Cu
Cuprum essential trace element
Copper
Cuprous readily undergoes _________________
disproportionation
Component of _______________ (respiratory pigment) and _____________ (with Fe)
(copper)
Hemocyanin; cytochrome oxidase
Uses of copper
protein precipitant (heavy metal)
Toxicity of copper
Wilson’s disease
Treatment for Wilson’s disease
Penicillamine
Obtained from furnace covered with black blisters
Blister Copper
2 important alloys: Brass ( ___+___ ); Bronze ( ___+___ )
Cu + Zn; Cu + Sn
Argentum, shining bright
Silver
Uses of silver
- Oligodynamic property- germicidal action: ability of certain heavy metals to inhibit
- Protein precipitant
Toxicity of silver
argyria
Antidote of argyria
NSS
Strong Ag proteinate
Protargol
Mild Ag proteinate
Argyrol
Silver proteinates:
- Argyrol
- Protargol
- Collargol
- Lunosol
(19%-23%) Eye antiseptic
Argyrol
Colloidal AgCl
Lunosol
Colloidal Ag proteinate
Collargol
(7.5% - 8.5%) ENT germicide
Protargol
Aurum, shining dawn, king of all metals
Gold
(18-22%) Gen germicide
Collargol
Silver proteinates stabilizer
EDTA
Gold is dissolved by
- aqua regia: HCl + HNO3 (3:1)
- selenic acid: H2SeO4
Only single acid that can dissolve gold
selenic acid
Use of gold
DMARDs (RA, gout)
Gold preps
- aurothioglucose (solganal*), IM
- gold sodium thiomalate (Myochrysin*), IM
- auranofin (Ridaura*), PO
Side effect of auranofin
glossitis
colloidal gold with stannic hydroxide
purple of cassius
