86954-36-1

Basic information

• Product Name: Americium-241
• Synonyms: Am-241;Americium, isotope of mass 241 (241am3+)
• CAS NO: 86954-36-1
• Molecular Formula: Am
• Molecular Weight: 240.982
• Mol File: 86954-36-1.mol
• Article Data: 6

Chemical Properties

• Appearance: /
• CAS DataBase Reference: Americium-241(CAS DataBase Reference)
• NIST Chemistry Reference: Americium-241(86954-36-1)
• EPA Substance Registry System: Americium-241(86954-36-1)

Safety Data

• Hazardous Substances Data: 86954-36-1(Hazardous Substances Data)

Upstream product

• 22878-02-0 AmO₂⁽¹⁺⁾ 
• 12323-66-9 AmO₂⁽²⁺⁾ 
• 12254-53-4 Americium(IV) hydroxide 

Relevant articles and documents

Electrochemical oxidation of Am(III) and Am(V) ions in HNO3 solutions containing potassium phosphotungstate K10P 2W17O61

The kinetics of electrochemical oxidation of Am(III) and Am(V) on Pt electrode in solutions of concentrated nitric acid containing potassium phosphotungstate was studied spectrophotometrically. The processes occurring in the system follow the rate law for reversible reaction. The direct reaction is first-order with respect to the concentration of Am(III) ions, and the reverse process is a zero-order reaction.

Electrochemical Oxidation of Am(III) Ions in HNO3 Solutions

Formal oxidation potentials (E(0)p) of the Am(IV)/Am(III) couple were measured and the kinetics of electrochemical oxidation of Am(III) on platinum electrode in concentrated solutions of nitric acid (1-6 M) containing potassium phosphotungstate K10P2W17O61 (KPW) was studied. The formal potential E(0)p only slightly depends on the concentration of HNO3 and isshifted toward the negative region by ~1.0 V as compared with t he standard values. The extent of Am(III) oxidation increases with increasing KPW concentration and decreasing concentration of nitric acid. Electrochemical oxidation of Am(III) is accompanied by radiochemical reduction of Am(IV) and is described by the equation -dC(Am(III))/dt=(k + k1)*C(Am(III)) - k1*C0 - k0, where k is the apparent rate constant of electrochemical oxidation of Am(III), k1 is the apparent rate constant of Am(IV) reduction, and k0 is the constant of radiation-chemical reduction of Am(IV).

Kinetics of dissociation of trivalent actiniae chelates of TMDTA

Measurements by a radiotracer technique show that the dissociation of TMDTA (trimethylenediamine-N,N-tetraacetic acid) chelates with Am, Cm, Bk, Cf, and Eu proceeds through an acid-catalyzed pathway. The rates of dissociation of An(TMDTA)- are 2 orders of magnitude faster than those of the corresponding EDTA chelates, presumably due to the greater lability of the nitrogen atom in the six-membered nitrogen-metal-nitrogen ring of TMDTA chelates. The rate of dissociation also decreased with decreasing metal ion radius. A proton-catalyzed mechanism similar to that for dissociation of EDTA complexes of lanthanide and actinide cations is consistent with the rate data.