16-Dehydroprogesterone is a steroidal progestin.

Physicochemical Properties

Molecular Formula	C21H28O2
Molecular Weight	312.4458
Exact Mass	312.209
CAS #	1096-38-4
PubChem CID	101964
Appearance	White to off-white solid powder
Density	1.1g/cm3
Boiling Point	461ºC at 760mmHg
Melting Point	185-187 °C(lit.)
Flash Point	171.5ºC
Vapour Pressure	1.11E-08mmHg at 25°C
Index of Refraction	1.557
LogP	4.643
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	2
Rotatable Bond Count	1
Heavy Atom Count	23
Complexity	640
Defined Atom Stereocenter Count	5
SMILES	CC(=O)C1=CC[C@@H]2[C@@]1(CC[C@H]3[C@H]2CCC4=CC(=O)CC[C@]34C)C
InChi Key	VRRHHTISESGZFN-RKFFNLMFSA-N
InChi Code	InChI=1S/C21H28O2/c1-13(22)17-6-7-18-16-5-4-14-12-15(23)8-10-20(14,2)19(16)9-11-21(17,18)3/h6,12,16,18-19H,4-5,7-11H2,1-3H3/t16-,18-,19-,20-,21+/m0/s1
Chemical Name	(8R,9S,10R,13S,14S)-17-acetyl-10,13-dimethyl-1,2,6,7,8,9,11,12,14,15-decahydrocyclopenta[a]phenanthren-3-one
HS Tariff Code	2934.99.9001
Storage	Powder-20°C 3 years 4°C 2 years In solvent -80°C 6 months -20°C 1 month Note: This product requires protection from light (avoid light exposure) during transportation and storage.
Shipping Condition	Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)

Biological Activity

References	[1]. Stimulation of 16-dehydroprogesterone and progesterone reductases of Eubacterium sp. strain 144 by hemin and hydrogen or pyruvate. Appl Environ Microbiol. 1985 May;49(5):1146-53.
Additional Infomation	16,17-didehydroprogesterone is a 20-oxo steroid, a 3-oxo-Delta(4) steroid and an enone. It is functionally related to a progesterone.

Solubility Data

Solubility (In Vitro)

DMSO : ~20 mg/mL (~64.01 mM)

Solubility (In Vivo)

Solubility in Formulation 1: ≥ 2.08 mg/mL (6.66 mM) (saturation unknown) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), clear solution. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 20.8 mg/mL clear DMSO stock solution to 400 μL PEG300 and mix evenly; then add 50 μL Tween-80 to the above solution and mix evenly; then add 450 μL normal saline to adjust the volume to 1 mL. Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution. Solubility in Formulation 2: ≥ 2.08 mg/mL (6.66 mM) (saturation unknown) in 10% DMSO + 90% Corn Oil (add these co-solvents sequentially from left to right, and one by one), clear solution. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 20.8 mg/mL clear DMSO stock solution to 900 μL of corn oil and mix evenly. Solubility in Formulation 3: 2 mg/mL (6.40 mM) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (add these co-solvents sequentially from left to right, and one by one), clear solution; with ultrasonication. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 20.0 mg/mL clear DMSO stock solution to 900 μL of 20% SBE-β-CD physiological saline solution and mix evenly. Preparation of 20% SBE-β-CD in Saline (4°C，1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution.  (Please use freshly prepared in vivo formulations for optimal results.)

Preparing Stock Solutions		1 mg	5 mg	10 mg
	1 mM	3.2005 mL	16.0026 mL	32.0051 mL
	5 mM	0.6401 mL	3.2005 mL	6.4010 mL
	10 mM	0.3201 mL	1.6003 mL	3.2005 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.