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455598

Sigma-Aldrich

O-Methylisourea hemisulfate salt

99%

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Synonym(s):
OMI®
Linear Formula:
H2NC(OCH3)=NH · 1/2H2SO4
CAS Number:
52328-05-9
Molecular Weight:
123.12
Beilstein:
3723107
EC Number:
257-851-8
MDL number:
MFCD00040594
PubChem Substance ID:
24868581
NACRES:
NA.22

Quality Level

200

Assay

99%

form

solid

mp

163-167 °C (lit.)

solubility

water: soluble 100 mg/mL, clear, colorless

SMILES string

COC(N)=N.COC(N)=N.OS(O)(=O)=O

InChI

1S/2C2H6N2O.H2O4S/c2*1-5-2(3)4;1-5(2,3)4/h2*1H3,(H3,3,4);(H2,1,2,3,4)

InChI key

QSCPQKVWSNUJLJ-UHFFFAOYSA-N

Gene Information

human ... OPRD1(4985) , OPRK1(4986) , OPRM1(4988)
rat ... Oprd1(24613) , Oprm1(25601)

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Legal Information

OMI is a registered trademark of Merck KGaA, Darmstadt, Germany

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Optimization of guanidination procedures for MALDI mass mapping.
Beardsley RL and Reilly JP.
Analytical Chemistry, 74(8), 1884-1890 (2002)
Kinetics of chemical modification of arginine and lysine residues in calf thymus histone H1.
K Mita et al.
Biopolymers, 20(6), 1103-1112 (1981-06-01)
H Wojciechowska et al.
Acta biochimica Polonica, 29(3-4), 197-204 (1982-01-01)
Selectivity of amidination using ornithine as model amino acid was investigated in detail. The results obtained were taken advantage of for studying the reactions with other polyfunctional amino acids: beta-tyrosine, isoserine, 2,3-diaminopropionic acid, 2,6-diamino-7-hydroxyazelaic acid and with the pentapeptide amide
Scott M Brittain et al.
Nature biotechnology, 23(4), 463-468 (2005-03-16)
Although mass spectrometry has become a powerful tool for the functional analysis of biological systems, complete proteome characterization cannot yet be achieved. Instead, the sheer complexity of living organisms demands fractionation of cellular extracts to enable more targeted analyses. Here
S Ebina et al.
The Journal of biological chemistry, 264(14), 7882-7888 (1989-05-15)
Procedures for chemical modification of bovine pancreatic trypsin inhibitor (BPTI) to allow site-specific coupling of immunogenic peptides are reported. Each of the modified proteins has a single free amino group; the other amino groups of lysine or the amino terminus
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