Reference Standards

Medical Isotopes offers a wide range of reference standards, a standardized object or substance which is used as a measurement base for similar objects or substances, such as the pharmaceuticals of Doxycycline-d5 hyclate, Lathosterol-2,2,4,4-d4, Panthenol-d6, Cyclosporin A-13C2,d6, Sodium (+-)-2-Hydroxybutyrate-2,3,3-d3, and Isavuconazole-d4.


Unlabeled Reference Standards

Catalog No. Product Name Enrichment
Quantity Price
36943 Loratadine Related Compound A
15 mg $1,171   Add to Cart
36944 Loratadine Related Compound B
15 mg $1,171   Add to Cart
36942 Loratadine Related Compound C
15 mg $1,171   Add to Cart
14294 Losartan carboxylic acid
Synonyms:
Losartan carboxy acid;
10 mg $290   Add to Cart
4879 Losartan Potassium
Synonyms:
2-Butyl-4-chloro-1-[[2’-(1H-tetrazol-5-yl)(1,1’-biphenyl)-4- yl]methyl]-1H-imidazole-5-methanolmonopotassium salt;
100 mg $290   Add to Cart
4881 Lovastatin
50 mg $1,300   Add to Cart
1 g $1,800   Add to Cart
4882 Lovastatin Hydroxy Acid
10 mg $1,300   Add to Cart
100 mg $2,900   Add to Cart
82653 (S)-Luliconazole-E-Isomer
   Request Quote
96537 γ-Lumi (-)-colchicine
Synonyms:
-(5,6,7,7b,8,10a-hexahydro-1,2,3,9-tetramethoxy-8-oxobenzo[a] cyclopenta[3,4]cyclobuta[1,2-c]cyclohepten-7-yl)-, [7S-(7&α;, 7b&α;,10a&α;)]acetamide; γ-Lumicolchicine; N-[(7S,7bS, 10aR)-5,6,7,7b,8,10a-Hexahydro-1,2,3,9-tetramethoxy-8-oxobenz;
1 mg $290   Add to Cart
5 mg $890   Add to Cart
5471 Luteolin
Synonyms:
3’,4’,5,7-Tetrahydroxyflavone;
10 mg $550   Add to Cart
50 mg $880   Add to Cart
36953 Lysophosphatidylcholine
250 mg $762   Add to Cart
36954 Lysophosphatidylcholine (Soy)
40 mg $1,171   Add to Cart
36329 m-Aminophenol
300 mg $1,171   Add to Cart
5472 Maduramacin
0.1 g $750   Add to Cart
0.25 g $1,500   Add to Cart
36773 Mafenide Related Compound A
50 mg $1,171   Add to Cart
36960 Magaldrate
200 mg $715   Add to Cart
36961 Magnesium Carbonate
2 g $715   Add to Cart
36962 Magnesium Chloride
1 g $715   Add to Cart
36963 Magnesium Hydroxide
1 g $715   Add to Cart
36964 Magnesium Phosphate
2 g $715   Add to Cart
36965 Magnesium Salicylate
200 mg $715   Add to Cart
36966 Magnesium Stearate
5 g $715   Add to Cart
36967 Magnesium Sulfate
1 g $715   Add to Cart
5473 Magnolol
Synonyms:
5,5’-Diallyl-2,2’-biphenyldiol;
0.1 g $350   Add to Cart
0.25 g $700   Add to Cart
36969 Maleic Acid
300 mg $1,171   Add to Cart
47163 6-Maleimidocaproic tert-Butylcarbazate
250 mg $675   Add to Cart
2.5 g $2,400   Add to Cart
36970 Malic Acid
500 mg $715   Add to Cart
108654 Malonyl-L-carnitine perchlorate salt
Synonyms:
L-Carnitine:CLO4, O-Malonyl;
100 mg $390   Add to Cart
36971 Maltitol
200 mg $715   Add to Cart
36972 Maltose Monohydrate
500 mg $715   Add to Cart
36973 Mandelic Acid
500 mg $715   Add to Cart
36975 Mangafodipir Related Compound A
15 mg $1,171   Add to Cart
36976 Mangafodipir Related Compound B
15 mg $1,171   Add to Cart
36977 Mangafodipir Related Compound C
15 mg $1,171   Add to Cart
36974 Mangafodipir Trisodium
200 mg $715   Add to Cart
36978 Manganese Chloride
1 g $715   Add to Cart
36979 Manganese Sulfate
1 g $715   Add to Cart
18054 Manidipine 2HCl
Synonyms:
Manidipine Dihydrochloride;
250 mg $490   Add to Cart
5474 Manidipine HCl
0.1 g $750   Add to Cart
0.25 g $1,500   Add to Cart
59594 Maropitant Citrate Salt
1 mg $390   Add to Cart
5476 Mecamylamine HCl
Synonyms:
2-(Methylamino)isocamphane hydrochloride; N,2,3,3- Tetramethylbicyclo[2.2.1]heptan-2-amine hydrochloride; Inversine;
5 mg $250   Add to Cart
25 mg $750   Add to Cart
36980 Medroxyprogesterone Acetate Related Com-pound A
25 mg $1,191   Add to Cart
36981 Medrysone
500 mg $715   Add to Cart
5145 3-Carboxy Mefenamic Acid
Synonyms:
(3-[(2-Carboxyphenyl)amino]-2-methylbenzoic Acid);
1 mg $900   Add to Cart
5 mg $2,200   Add to Cart
36983 Mefloquine Related Compound A
20 mg $1,171   Add to Cart
36982 MefloquineHCl
100 mg $715   Add to Cart
36984 Meglumine
500 mg $715   Add to Cart
5339 Melamine
Synonyms:
1,3,5-Triazine-2,4,6-triamine; 2,4,6-Triamino-s-triazine; Cyanurotriamide; NSC 2130;
1 g $90   Add to Cart
5 g $190   Add to Cart
36993 Melatonin Related Compound A
15 mg $1,171   Add to Cart
36985 Melengestrol Acetate Related Compound A
25 mg $1,171   Add to Cart
36986 Melengestrol Acetate Related Compound B
25 mg $1,171   Add to Cart
4992 5’-Carboxy Meloxicam
Synonyms:
2-[[(4-Hydroxy-2-methyl-1,1-dioxido-2H-1,2-benzothiazin-3-yl) carbonyl]amino]-5-thiazolecarboxylic acid;
5 mg $290   Add to Cart
36988 Meloxicam Related Compound A
25 mg $1,171   Add to Cart
36989 Meloxicam Related Compound B
25 mg $1,171   Add to Cart
36990 Meloxicam Related Compound C
30 mg $1,171   Add to Cart
36987 MelphalanHCl
100 mg $715   Add to Cart
11553 3-Mercapto-2-methylpropanoic acid
Synonyms:
3-Mercaptoisobutyric Acid; Captopril impurity C; Captopril EP Impurity C;
1 g $190   Add to Cart
5 g $590   Add to Cart
CN71205 6-Mercaptopurine-13C2,15N (major)
1 mg $490   Add to Cart
5 mg $1,590   Add to Cart
82981 (-)-Mesembranol
   Request Quote
74288 Mesocarb
10 mg $1,900   Add to Cart
25 mg $3,300   Add to Cart
36994 Metacresol
1 mL $715   Add to Cart
36995 Metaraminol Bitartrate
200 mg $715   Add to Cart
36996 Metaxalone Related Compound A
10 mg $1,171   Add to Cart
36997 Metaxalone Related Compound B
25 mg $1,171   Add to Cart
36998 Metaxalone Related Compound C
25 mg $1,190   Add to Cart
36999 Metformin Related Compound A
30 mg $1,171   Add to Cart
37000 Metformin Related Compound B
25 mg $1,171   Add to Cart
37001 Metformin Related Compound C
25 mg $1,171   Add to Cart
37002 Methacholine Chloride
Synonyms:
O-Acetyl-β-methylcholine Chloride;
500 mg $733   Add to Cart
37003 Methacrylic Acid Copolymer Type B
200 mg $715   Add to Cart
37004 Methacrylic Acid Copolymer Type C
200 mg $715   Add to Cart
37008 Methantheline Bromide
200 mg $715   Add to Cart
37009 Methapyrilene Fumarate
200 mg $715   Add to Cart
37010 Metharbital CIII
200 mg $785   Add to Cart
37011 Methazolamide
500 mg $715   Add to Cart
37012 MethdilazineHCl
200 mg $715   Add to Cart
37013 Methenamine
500 mg $715   Add to Cart
37014 Methenamine Hippurate
200 mg $715   Add to Cart
74289 Methotrexate Sodium
10 mg $1,690   Add to Cart
25 mg $1,990   Add to Cart
65953 8-Methoxy entecavir
Synonyms:
Entecavir EP impurity E;
   Request Quote
80659 4-Methoxy fenretinide
   Request Quote
83073 6-Methoxy moxifloxacin
   Request Quote
85718 4-Methoxy rabeprazole
   Request Quote
85661 3-Methoxy ropinirole
   Request Quote
79566 3-Methoxy tyramine
   Request Quote
59811 7-Methoxy-1-naphthaleneacetamide
Synonyms:
Agomelatine impurity B;
   Request Quote
5667 5-methoxy-1H-indole-2-carboxylic acid
50 mg    Request Quote
11666 6-Methoxy-2-naphthaleneacetic Acid
Synonyms:
2-(6-Methoxy-2-naphthyl)acetic Acid; 6-Methoxy-2-naphthylacetic Acid; 6-MNA; BRL 10720; Desmethyl Naproxen; Naproxen EP Impurity I;
10 Null $90   Add to Cart
50 mg $290   Add to Cart
83178 6-Methoxy-2-naphthylacetic acid glucuronide
Synonyms:
6-MNA glucuronide;
   Request Quote
83177 6-Methoxy-2-naphthylacetic acid sulfate
Synonyms:
6-MNA sulfate;
   Request Quote
CD83176 6-Methoxy-2-naphthylacetic acid-13C-d3
Synonyms:
6-MNA-13C-d3;
   Request Quote
5626 5-methoxy-2-nitrophenol
50 mg    Request Quote
5642 5-methoxy-2-phenyl-1H-indole
50 mg    Request Quote
83973 5-Methoxy-2-[[(3,5-dimethylpyridin-2-yl)methyl]sulphanyl]-1H- benzimidazole
   Request Quote
83974 5-Methoxy-2-[[(4-chloro-3,5-dimethylpyridin-2-yl)methyl]sulphanyl ]-1H-benzimidazole
   Request Quote
83975 2-[[(4-Methoxy-3,5-dimethylpyridin-2-yl)methyl]sulphinyl]-1H- benzimidazole
   Request Quote
51596 5-[[3-Methoxy-4-[(4-methoxyphenyl)methoxy]phenyl]methyl]-2,4- pyrimidinediamine
Synonyms:
GW 2580;
   Request Quote
74290 Methoxy-Cannflavin A
10 mg $2,490   Add to Cart
C74291 Methoxy-Cannflavin C
10 mg $2,490   Add to Cart
11621 N-(Methoxycarbonyl)-L-tert-leucine
Synonyms:
N-(Methoxycarbonyl)-3-methyl-L-valine; Atazanavir related compound A;
1 g $490   Add to Cart
5 g $1,590   Add to Cart
78241 18-Methoxycoronaridine
   Request Quote
41345 7-Methoxycoumarin
5 g $190   Add to Cart
25 g $590   Add to Cart
65951 (αZ)-α-(Methoxyimino)-N-[(5aR,6R)-1,4,5a,6-tetrahydro-1,7 -dioxo-3H,7H-azeto[2,1-β]furo[3,4-d][1,3]thiazin-6-yl]-2- furanacetamide
Synonyms:
Cefuroxime axetil impurity E;
5 mg $590   Add to Cart
25 mg $1,900   Add to Cart
65945 (Z)-2-Methoxyimino-2-furanacetic acid ammonium salt
Synonyms:
Cefuroxime sodium EP impurity I ammonium salt;
1 g $190   Add to Cart
5 g $590   Add to Cart
78518 10-Methoxyiminostilbene
Synonyms:
Oxcarbazepine Impurity;
1 mg $190   Add to Cart
5 mg $590   Add to Cart
35348 2-(7-Methoxynaphthalen-1-yl)ethanamine hydrochloride
Synonyms:
Agomelatine Impurity A;
   Request Quote
5631 3-Methoxyphenol
Synonyms:
3-Hydroxyanisol; Resorcinol monomethyl ether;
   Request Quote
74190 5-Hydroxy-2-(2-hydroxy-4-methoxyphenyl)-6,7,8-trimethoxychroman-4 -one
10 mg $1,990   Add to Cart
25 mg $2,490   Add to Cart
74191 5-hydroxy-2-(2-hydroxy-5-methoxyphenyl)-6,7,8-trimethoxychroman-4 -one
10 mg $1,990   Add to Cart
25 mg $2,490   Add to Cart
74192 5-Hydroxy-2-(3-hydroxy-4-methoxyphenyl)-6,7,8-trimethoxychroman-4 -one
   Request Quote
D100181 1-(4-methoxyphenyl)N-ethylpropan-2-amine-d3 HCl salt
   Request Quote
D100180 1-(4-methoxyphenyl)N-methylpropan-2-amine-d3 HCl salt
   Request Quote
D100179 1-(4-methoxyphenyl)propan-2-amine-d3 HCl salt
   Request Quote
105272 2-Methoxypyrimidine-5-boronic acid
1 g $190   Add to Cart
5 g $590   Add to Cart
5376 3-Methoxytyramine hydrochloride
Synonyms:
3-O-Methyldopamine HCl; 3-Methoxy-4-hydroxyphenethylamine hydrochloride; 4-(2-Aminoethyl)-2-methoxyphenol hydrochloride;
25 mg $90   Add to Cart
100 mg $290   Add to Cart
5 mg $49   Add to Cart
5641 5-methy-2-phenyl-1H-indole
50 mg    Request Quote
108537 Methyl 2-hydroxyethane-1-sulfonate
   Request Quote
47344 Methyl 4-acetamido-5-bromo-2-methoxybenzoate
Synonyms:
Bromopride impurity B;
   Request Quote
37016 Methyl Caproate
300 mg $715   Add to Cart
37017 Methyl Caprylate
300 mg $715   Add to Cart
47420 3-O-Methyl carbidopa
Synonyms:
Carbidopa related compound A;
5 mg $190   Add to Cart
25 mg $590   Add to Cart
37025 Methyl Isobutyl Ketone
1.2 mL/ampule $715   Add to Cart
37028 Methyl Myristate
300 mg $715   Add to Cart
37029 Methyl Oleate
500 mg $715   Add to Cart
37030 Methyl Palmitoleate
300 mg $715   Add to Cart
C76136 6-Methyl purine-13C
   Request Quote
74292 Methyl Riluzole
10 mg $1,450   Add to Cart
25 mg $2,760   Add to Cart
59934 5-(S-Methyl) albendazole
Synonyms:
Albendazole impurity F;
5 mg $290   Add to Cart
25 mg $990   Add to Cart
O81257 4’-O-Methyl-(-)-Epi-Gallocatechin
   Request Quote
5663 5-methyl-1H-indole-2-carboxylic acid
50 mg    Request Quote
5673 4-methyl-1H-indole-2-carboxylic acid
50 mg    Request Quote
5677 6-methyl-1H-indole-2-carboxylic acid
50 mg    Request Quote
5678 7-methyl-1H-indole-2-carboxylic acid
50 mg    Request Quote
97251 (1S,3S)-3-[[(2S)-3-Methyl-2-[[methyl-[[2-(1-methylethyl)thiazol-4 -yl]methyl]carbamoyl]amino]-butanoyl]amino]-4-phenyl-1-[(1S)-2- phenyl-1-[[(thiazol-5-ylmethoxy)carbonyl]amino]ethyl]butyl-(2S)-3 -methyl-2-[[methyl-[[2-(1-methylethyl)thiazol-4-yl]methyl] carbamoyl]amino]butanoate
Synonyms:
Ritonavir Impurity-U (EP); O-Acyl isomer of Ritonavir;
   Request Quote
12045 5-Methyl-5-propyl-2-dioxanone
Synonyms:
Carisoprodol impurity B;
50 mg $190   Add to Cart
250 mg $590   Add to Cart
11777 4-Methyl-5-[(2-aminoethyl)thiomethyl]imidazole dihydrochloride
Synonyms:
2-[[(5-Methyl-1H-imidazol-4-yl)methyl]thio]-ethanamine Dihydrochloride; 4-[(2-Aminoethyl)thiomethyl]-5-methylimidazole Dihydrochloride; 5-[[(2-Aminoethyl)thio]methyl]-4-methylimidazole Dihydrochloride;
200 mg $290   Add to Cart
1 g $990   Add to Cart
83959 5-Methyl-L-norleucine Orlistat Analogue
   Request Quote
87634 (N-Methyl-Leu) Vancomycin B
   Request Quote
84484 5-Methyl-tetrahydropteroic acid (Me THPA)
   Request Quote
59948 9-Methylacridine
1 g $290   Add to Cart
5 g $590   Add to Cart
77155 4-Methylamino antipyrine N-oxide
Synonyms:
4-Methylamino Antipyridine N-Oxide; 4-Methylamino Phenazone N-Oxide;
   Request Quote
108672 4-((Methylamino)methyl)-N-(4-nitro-[1,1’-biphenyl]-3-yl) benzamide
   Request Quote
5291 2-Methylbutyric Acid
25 g $590   Add to Cart
37018 Methylcellulose
1 g $715   Add to Cart
47435 Methyldesphenylchloridazon
Synonyms:
Chloridazon impurity 2;
   Request Quote
37026 3-O-Methyldopa
50 mg $1,171   Add to Cart
37020 MethyldopateHCl
200 mg $715   Add to Cart
37021 Methylene Blue
500 mg $715   Add to Cart
74293 Methylene Blue Bromide
10 mg $1,990   Add to Cart
25 mg $2,990   Add to Cart
37022 Methylene Simvastatin
30 mg $1,171   Add to Cart