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N4128

Sigma-Aldrich

19-Norethindrone

≥98%, powder

Synonym(s):

17α-Ethynyl-19-nortestosterone, 17-Hydroxy-19-nor-17α-4-pregnen-20-yn-3-one, 17α-Ethynyl-17β-hydroxy-19-nor-4-androsten-3-one, 19-Nor-17α-ethynyl-4-androsten-17β-ol-3-one, 19-Norethisterone

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About This Item

Empirical Formula (Hill Notation):
C20H26O2
CAS Number:
68-22-4
Molecular Weight:
298.42
Beilstein:
1915671
EC Number:
200-681-6
MDL number:
MFCD00067596
UNSPSC Code:
12352211
PubChem Substance ID:
24897669
NACRES:
NA.77

biological source

synthetic (organic)

sterility

non-sterile

Assay

≥98%

form

powder

storage condition

protect from light

color

white to off-white

mp

205-206 °C (lit.)

solubility

chloroform: ≥50 mg/mL, clear, colorless

shipped in

ambient

storage temp.

room temp

SMILES string

[H][C@]12CCC(=O)C=C1CC[C@]3([H])[C@]2([H])CC[C@@]4(C)[C@@]3([H])CC[C@@]4(O)C#C

InChI

1S/C20H26O2/c1-3-20(22)11-9-18-17-6-4-13-12-14(21)5-7-15(13)16(17)8-10-19(18,20)2/h1,12,15-18,22H,4-11H2,2H3/t15-,16+,17+,18-,19-,20-/m0/s1

InChI key

VIKNJXKGJWUCNN-XGXHKTLJSA-N

Gene Information

human ... AR(367) , PGR(5241)
rat ... Ar(24208)

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Biochem/physiol Actions

19-norethindrone is an oral contraceptive involved in the inhibition of cytosolic sulfotransferases (SULT).

Pictograms

Health hazardEnvironment
GHS08,GHS09

Signal Word

Danger

Hazard Statements

H351,H360FD,H362,H410

Hazard Classifications

Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 2 - Lact. - Repr. 1A

Storage Class Code

6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

WGK

WGK 3

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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There is limited information on the metabolism of levonorgestrel, norethindrone and structurally related contraceptive steroids. Both levonorgestrel and norethindrone undergo extensive reduction of the alpha, beta-unsaturated ketone in ring A. Levonorgestrel also undergoes hydroxylation at carbons 2 and 16. The
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