Skip to Content
Merck
All Photos(1)

Key Documents

View All Documentation

Safety Information

455598

Sigma-Aldrich

O-Methylisourea hemisulfate salt

99%

Synonym(s):

OMI®

Sign Into View Organizational & Contract Pricing
All Photos(1)

About This Item

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
UNSPSC Code:
12352100
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

functional group

amine

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)

Looking for similar products? Visit Product Comparison Guide

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

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

JAN Code

455598-BULK:
455598-100MG:
455598-1VL:
455598-100G:
455598-VAR:
455598-1VL-KC:

Choose from one of the most recent versions:

Certificates of Analysis (COA)

Lot/Batch Number
BCCK2956
BCCG4256
BCCF0974
BCCB6465
BCBV2864

Don't see the Right Version?

If you require a particular version, you can look up a specific certificate by the Lot or Batch number.

Search for a COA

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Optimization of guanidination procedures for MALDI mass mapping.
Beardsley RL and Reilly JP.
Analytical Chemistry, 74(8), 1884-1890 (2002)
K M Fazili et al.
Biochemistry and molecular biology international, 31(5), 807-816 (1993-12-01)
Using acetic anhydride, potassium cyanate and O-methyl isourea six chemically modified derivatives of bovine serum albumin with chemical modification on lysine side chains have been prepared. All the modified preparations were found to be homogeneous with respect to size and
Valerie J Carabetta et al.
Journal of the American Society for Mass Spectrometry, 21(6), 1050-1060 (2010-03-09)
The study of isolated protein complexes has greatly benefited from recent advances in mass spectrometry instrumentation and quantitative, isotope labeling techniques. The comprehensive characterization of protein complex components and quantification of their relative abundance relies heavily upon maximizing protein and
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
Complex formation of guanidinated bovine trypsin inhibitor (Kunitz) with trypsin, chymotrypsin and trypsinogen as studied by the spin-label technique.
H R Wenzel et al.
FEBS letters, 140(1), 53-57 (1982-04-05)
View All Related Papers

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service