Methylmalonic acid-d3 is the deuterated form of Methylmalonic acid. Methylmalonic acid (Methylmalonate) is an indicator of vitamin B-12 deficiency in cancer patients.

Physicochemical Properties

Molecular Formula	C4H3D3O4
Molecular Weight	121.11
Exact Mass	121.045
CAS #	42522-59-8
Related CAS #	Methylmalonic acid;516-05-2
PubChem CID	10820511
Appearance	White to off-white solid powder
Density	1.4±0.1 g/cm3
Boiling Point	334.4±25.0 °C at 760 mmHg
Melting Point	134-136ºC(lit.)
Flash Point	170.2±19.7 °C
Vapour Pressure	0.0±1.5 mmHg at 25°C
Index of Refraction	1.474
LogP	-0.21
Hydrogen Bond Donor Count	2
Hydrogen Bond Acceptor Count	4
Rotatable Bond Count	2
Heavy Atom Count	8
Complexity	103
Defined Atom Stereocenter Count	0
SMILES	[2H]C([2H])([2H])C(C(=O)O)C(=O)O
InChi Key	ZIYVHBGGAOATLY-FIBGUPNXSA-N
InChi Code	InChI=1S/C4H6O4/c1-2(3(5)6)4(7)8/h2H,1H3,(H,5,6)(H,7,8)/i1D3
Chemical Name	2-(trideuteriomethyl)propanedioic acid
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
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

ln Vitro	Drug compounds have included stable heavy isotopes of carbon, hydrogen, and other elements, mostly as quantitative tracers while the drugs were being developed. Because deuteration may have an effect on a drug's pharmacokinetics and metabolic properties, it is a cause for concern [1].
References	[1]. Impact of Deuterium Substitution on the Pharmacokinetics of Pharmaceuticals. Ann Pharmacother. 2019;53(2):211-216. [2]. Methylmalonic Acid and Homocysteine as Indicators of Vitamin B-12 Deficiency in Cancer. PLoS One. 2016 Jan 25;11(1):e0147843.

Solubility Data

Solubility (In Vitro)

DMSO: 100 mg/mL (825.70 mM)

Solubility (In Vivo)

Solubility in Formulation 1: ≥ 2.5 mg/mL (20.64 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 25.0 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: ≥ 2.5 mg/mL (20.64 mM) (saturation unknown) 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. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 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. Solubility in Formulation 3: ≥ 2.5 mg/mL (20.64 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 25.0 mg/mL clear DMSO stock solution to 900 μL of corn oil and mix evenly.  (Please use freshly prepared in vivo formulations for optimal results.)

Preparing Stock Solutions		1 mg	5 mg	10 mg
	1 mM	8.2570 mL	41.2848 mL	82.5696 mL
	5 mM	1.6514 mL	8.2570 mL	16.5139 mL
	10 mM	0.8257 mL	4.1285 mL	8.2570 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.