Solid phase
Official name
Methaneseleninic acid
Secondary names
Methylseleninic acid; Methylselenic acid; Methylseleninate; MSA
CAS number
28274-57-9
Type
Family
molecular solid
Class
non polar molecular solid
Compound type
inorganic molecular solid
Chemical composition
Formula
$CH_3SeOOH$
Chemical formula
CH3SeOOH
Elemental formula
C H4 O2 Se
Isotope mixture type
terrestrial abundance
2.0
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
$CH_3SeOOH$ Methaneseleninic acid molecule 1 1.0 1 constituent molecular main
Chemical functions
  Function Number
$R-CH_3$ 1
$R-OH$ 1
Chemical bonds
  Bond Number
$\geq C-H$ 3
$\geq C-Se \eqslantless$ 1
$>Se=O$ 1
$\eqslantgtr Se-O-$ 1
$-O-H$ 1
Class
molecular solids with polar molecules (02)
Type
with polyatomic organic polar molecules (CnHm...) (02.01)
Group
hydrocarbon with chalcogens (02.01.03)
Phase type
crystalline
Crystal system
orthorhombic
Crystal class
disphenoidal
Crystal class symbol
222 (D2)
Crystal spacegroup
P2(1)2(1)2(1)
Molar mass
127.012 $g/mol$
State NTP
solid
Phase transitions
Phase transition type Other phases Temperature - Pressure
solid-liquid liquid 128-132°C (401-405 K)
Refringence type
unknown
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