(3R,4S)-Tofacitinib

This product is for research use only, not for human use. We do not sell to patients.

For small sizes, please check our retail website as below: www.invivochem.com

Size	Price	Stock
100mg	$1875	To Be Confirmed
200mg	$2810	To Be Confirmed
500mg	$4740	To Be Confirmed

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Cat #: V33937 CAS #: 1092578-46-5 Purity ≥ 99%

Description: (3R,4S)-Tofacitinib (Tofacitinib Impurity A) is a less active diastereomer/enantiomer of Tofacitinib (CP 690550; tasocitinib; Xeljanz), which is a JAK3 (Janus-Associated kinase) inhibitor and an FDA approved drug for the treatment of rheumatoid arthritis (RA), psoriatic arthritis, and ulcerative colitis.

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Molecular Weight (MW)	312.37
Molecular Formula	C16H20N6O
CAS No.	1092578-46-5
Synonyms	Tofacitinib Impurity A;

Preparing Stock Solutions

Solvent volume to be added	Mass (the weight of a compound)
Mother liquor concentration	1mg	5mg	10mg	20mg
1mM	3.2013 mL	16.0067 mL	32.0133 mL	64.0266 mL
5mM	0.6403 mL	3.2013 mL	6.4027 mL	12.8053 mL
10mM	0.3201 mL	1.6007 mL	3.2013 mL	6.4027 mL
20mM	0.1601 mL	0.8003 mL	1.6007 mL	3.2013 mL

The molarity calculator equation

Mass(g) = Concentration(mol/L) × Volume(L) × Molecular Weight(g/mol)

Mass

Concentration

Volume

Molecular Weight*

The dilution calculator equation

Concentration_(start) × Volume_(start) = Concentration_(final) × Volume_(final)

This equation is commonly abbreviated as: C₁ V₁ = C₂ V₂

Concentration_(start)

Volume_(start)

Concentration_(final)

Volume_(final)

Step One: Enter information below

Dosage mg/kg Average weight of animals g Dosing volume per animal µL Number of animals

Step Two: Enter the in vivo formulation

%DMSO + % + %Tween 80 + %ddH₂O

Calculation Results:

Working concentration: mg/ml;

Method for preparing DMSO master liquid: mg drug pre-dissolved in µL DMSO(Master liquid concentration mg/mL) ,Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug.

Method for preparing in vivo formulation: Take µL DMSO master liquid, next add µL PEG300, mix and clarify, next add µL Tween 80,mix and clarify, next add µL ddH₂O,mix and clarify.

Note:

(1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
(2) Be sure to add the solvent(s) in order.