Merck
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I6758

Sigma-Aldrich

IPTG

≥99% (TLC), ≤0.1% Dioxane

Synonym(s):
Isopropyl β-D-1-thiogalactopyranoside, IPTG, Isopropyl β-D-thiogalactoside
Empirical Formula (Hill Notation):
C9H18O5S
CAS Number:
Molecular Weight:
238.30
Beilstein:
4631
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.31

biological source

synthetic

Quality Level

description

non-ionic

assay

≥99% (TLC)

form

powder

technique(s)

thin layer chromatography (TLC): suitable

impurities

≤0.1% Dioxane

storage temp.

2-8°C

SMILES string

CC(C)S[C@@H]1OC(CO)[C@H](O)C(O)[C@H]1O

InChI

1S/C9H18O5S/c1-4(2)15-9-8(13)7(12)6(11)5(3-10)14-9/h4-13H,3H2,1-2H3/t5-,6+,7+,8-,9+/m1/s1

InChI key

BPHPUYQFMNQIOC-NXRLNHOXSA-N

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Packaging

1, 5, 10 g in glass bottle

Application

IPTG is commonly used in cloning procedures that require induction of β-galactosidase activity. It is used in conjunction with X-Gal or Bluo-Gal in blue-white selection of recombinant bacterial colonies that induce expression of the lac operon in Escherichia coli. IPTG functions by binding to the lacI repressor and altering its conformation, which prevents the repression of the β-galactosidase coding gene lacZ.

Other Notes

Non-metabolizable galactose analog.

Reconstitution

A stock solution (0.1 M) is prepared by dissolving IPTG in water with subsequent sterile filtration of the solution. The final concentration of IPTG in indicator plates should be 0.2 mM.

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

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Certificate of Origin

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