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
80526 Emtricitabine Related Impurity 5
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80516 Emtricitabine Ring-opening Impurity
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80517 Emtricitabine trans-Cyclic Impurity
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79954 Enalapril EP Impurity E Maleate
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79945 Enalapril EP Impurity F Maleate
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79946 Enalapril EP Impurity G (Mixture of Diastereomers)
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79944 Enalapril EP Impurity H (Mixture of Isomers)
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79947 Enalaprilat Dehydrate EP Impurity A
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79948 Enalaprilat Dehydrate EP Impurity B
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C79949 Enalaprilat Dehydrate EP Impurity C
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D79950 Enalaprilat Dehydrate EP Impurity D
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79951 Enalaprilat Dehydrate EP Impurity E
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79952 Enalaprilat Dehydrate EP Impurity F
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C79943 Enalaprilat(Enalapril EP Impurity C)
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109176 Endosulfan-alcohol
100 mg $182   Add to Cart
109177 Endosulfan-lacton
Synonyms:
4,7-Methanoisobenzofuran-1(3H)-one, 4,5,6,7,8,8-hexachloro-3a,4,7 ,7a-tetrahydro-; 5-Norbornene-2-carboxylic acid, 1,4,5,6,7,7- hexachloro-3-(hydroxymethyl)-, ?-lactone (6CI,7CI); 4,5,6,7,8,8- Hexachloro-3a,4,7,7a-tetrahydro-4,7-methanoisobenzofuran-1(3H)- o...;
100 mg $182   Add to Cart
81350 3-Enol gestodene
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109178 Enoxacin sesquihydrate
Synonyms:
Enoxacin Sesquihydrate; 1-Ethyl-6-fluoro-1,4-dihydro-4-oxo-7-(1- piperazinyl)-1,8-Naphthyridine-3-carboxylic Acid Hydrate (2:3);
100 mg $204   Add to Cart
109179 Enoxastrobin
Synonyms:
Enoxastrobin; Benzeneacetic acid, 2-[[[(E)-[(2E)-3-(4- chlorophenyl)-1-methyl-2-propen-1-ylidene]amino]oxy]methyl]-?- (methoxymethylene)-, methyl ester, (?E)-; Enestroburin; 2-[[[(E)- [(2E)-3-(4-chlorophenyl)-1-methyl-2-propenylidene]amino]oxy] methyl]-?-(me...;
50 mg $279   Add to Cart
74248 Enoximone Sulfoxide
10 mg $1,690   Add to Cart
25 mg $1,990   Add to Cart
80146 Enramycin (Mixture of Enduracidin A and Enduracidin B)
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37180 Ensulizole
200 mg $715   Add to Cart
81181 Ent-Galantamine (Galantamine Impurity F)
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79964 Entacapone EP Impurity B
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C79965 Entacapone EP Impurity C
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D79966 Entacapone EP Impurity D
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79967 Entacapone EP Impurity E
Synonyms:
OR-486; 3,5-Dinitro-pyrocatechol; 1,2-Dihydroxy-3,5-dinitrobenzene; 3,5- Dinitro-1,2-benzenediol; 3,5-Dinitrocatechol; 3,5- Dinitropyrocatechol;;
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79960 Entacapone EP Impurity I
Synonyms:
Isopropyl (2E)-2-Cyano-3-(3,4-dihydroxy-5-nitrophenyl)prop-2- enoate;
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79963 Entacapone-3-β-D-Glucuronide
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80331 Entecavir Glucuronide
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80326 Entecavir Impurity 2
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80329 Entecavir Impurity 5
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80320 Entecavir Impurity E
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80038 Enzalutamide Impurity 1
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C80037 Enzalutamide Impurity C
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80537 Epalrestat (E, E)-Isomer
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80538 Epalrestat (E, Z)-Isomer
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80536 Epalrestat (Z, Z)-Isomer
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80539 Epalrestat Dimer
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108725 Epalrestat ethyl ester
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80503 Ephedrine Impurity A (Racemic)
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87639 Epi-(26R) Vancomycin B
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81186 Epi-Galantamine N-Oxide
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82292 epi-Lincomycin-2,7-dipalmitate
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80235 (-)-Epiafzelechin
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O80236 (-)-Epiafzelechin 7-O-glucopyranoside
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5263 17-Epiestriol
Synonyms:
((16a,17a)- Estra-1,3,5(10)-triene-3,16,17-triol; 16a,17a-Estriol; 16a-Hydroxy-17a-estradiol; 17a-Estriol; NSC 84051); Estriol Impurity E;
1 mg $825   Add to Cart
O78291 Epigallocatechin 3-O-(3-O-Methyl)-Gallate
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79588 Epimer of Doxorubicin Impurity B
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C79589 Epimer of Doxorubicin Impurity C
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80443 Epinastine Related Compound A
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4175 DL-Epinephrine
Synonyms:
1-(3,4-dihydroxyphenyl)-2-(methylamino)ethanol; 3,4-dihydroxy-1-[1-hydroxy-2-(methylamino)-ethyl]benzene; 3,4-DIHYDROXY-ALPHA-(METHYLAMINOMETHYL)BENZYL ALCOHOL; 4-[1-HYDROXY-2-(METHYLAMINO)ETHYL]-1,2-BENZENEDIOL; DL-ADRENALINE; DL-EPINEPHRINE;
5 mg $90   Add to Cart
36666 Epinephrine Bitartrate
200 mg $715   Add to Cart
80349 Epinephrine Glucuronide
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17785 DL-Epinephrine hydrochloride
Synonyms:
DL-Adrenaline; 4-(1-Hydroxy-2-[methylamino]ethyl)-1,2-benzenediol hydrochloride;
5 mg $90   Add to Cart
87213 Epirubicin Impurity 1(13-Deoxyepirubicin)
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87212 Epirubicin Impurity G (Epirubicin Dimer)
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36667 EpitetracyclineHCl
200 mg $1,171   Add to Cart
64741 Δ9,11-7β-Eplerenone
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80259 Eplerenone EP Impurity A
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80252 Eplerenone EP Impurity B
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D80253 Eplerenone EP Impurity D
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80255 Eplerenone EP Impurity F Sodium Salt
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80256 Eplerenone EP Impurity G
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80258 Eplerenone Impurity 1
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36669 Epoprostenol Related Compound B
15 mg $1,171   Add to Cart
80067 Epoxiconazole Impurity 1
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80310 8-epi-11,12-Epoxy erythromycin A
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80293 Epoxy Exemestane (6-Alfa Isomer)
Synonyms:
6α-Spiro[androsta-1,4-diene-6,2’-oxiran]-3,17-dione;
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80296 Epoxy Exemestane (6-β Isomer)
Synonyms:
6 β-Spiro[androsta-1,4-diene-6,2’-oxiran]-3,17-dione;
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108663 trans-Epoxyphytomenadione
5 mg $390   Add to Cart
5273 Eprosartan
Synonyms:
((E)-3-[2-Butyl-1-[(4-carboxyphenyl)methyl]imidazol-5-yl]-2-(2- thienylmethyl)-2-propenoic Acid; SKF-108566);
5 mg $850   Add to Cart
25 mg $2,000   Add to Cart
80264 Eprosartan Impurity 3
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80265 Eprosartan Impurity 4
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80266 Eprosartan Impurity 5
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5438 Eprosartan Mesylate
5 mg $1,500   Add to Cart
25 mg $2,500   Add to Cart
80261 Eprosartan Mesylate
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36671 Eprosartan Related Compound A
20 mg $1,171   Add to Cart
80268 Eprosartan related compound A
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36672 Eprosartan Related Compound B
15 mg $1,171   Add to Cart
36673 Eprosartan Related Compound C
25 mg $1,171   Add to Cart
36674 Eprosartan Related Compound D
15 mg $1,171   Add to Cart
36675 Eprosartan Related Compound E
15 mg $1,171   Add to Cart
109180 EPTC
250 mg $146   Add to Cart
36670 Equilin
25 mg $786   Add to Cart
5439 (+/-)-Equol
1 mg $290   Add to Cart
5 mg $750   Add to Cart
110078 Erbon 10 µg/mL in Cyclohexane
87671 Ergocalciferol Glucuronide
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87670 Ergocalciferol Sulfate
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82939 Ergonovine (Ergometrine)
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36678 Ergonovine Maleate
100 mg $715   Add to Cart
36679 Ergotamine Tartrate
150 mg $715   Add to Cart
36680 Ergotaminine
100 mg $715   Add to Cart
80238 Eribulin Impurity 1
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80388 Erlotinib Carboxylic Acid
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80387 Erlotinib Hydroxy Metabolite
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80361 Erlotinib impurity 1
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80376 Erlotinib Impurity 10
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80377 Erlotinib Impurity 11
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80379 Erlotinib Impurity 12
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80380 Erlotinib Impurity 13
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80381 Erlotinib Impurity 14
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80382 Erlotinib Impurity 15
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80383 Erlotinib Impurity 16
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80384 Erlotinib Impurity 17
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80363 Erlotinib impurity 3
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80364 Erlotinib impurity 4
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80369 Erlotinib Impurity 5
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80373 Erlotinib Impurity 7
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80375 Erlotinib Impurity 9
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80358 Erlotinib impurity, 6,7-bis(2-chloroethoxy)
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80360 Erlotinib impurity, 6-(2-chloroethoxy)-7-(2-methoxyethoxy)
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80359 Erlotinib impurity, 6-(2-methoxyethoxy)-7-(2-chloroethoxy)
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O80357 Erlotinib O-Desmethyl Metabolite Isomer (M14) HCl
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80054 Ertapenem Acetic Acid Adduct Impurity
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80048 Ertapenem Dimer Amide Impurity
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80051 Ertapenem Dimer H2Oa
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80049 Ertapenem Dimer I
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80050 Ertapenem Dimer II
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80045 Ertapenem Impurity DIPP
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80044 Ertapenem Impurity Pro-maba
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80052 Ertapenem Methanolysis Impurity
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80055 Ertapenem Oxazinone Impurity
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80047 Ertapenem Ring Open Impurity
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80042 Ertapenem Side Chain Enantiomer 1
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80043 Ertapenem Side Chain Enantiomer 2 HCl
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80046 Ertapenem side chain impurity (propyl ester)
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80143 Ertugliflozin
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80404 Erucamide
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36681 Erythorbic Acid
50 mg $715   Add to Cart
36682 Erythritol
200 mg $715   Add to Cart
D108698 (Erythro)-Chloramphenicol-d5 100 µg/mL in Acetonitrile
Synonyms:
(Erythro)-Chloramphenicol D5 (ring D4, benzyl D); 2,2-Dichloro-N- [(1S,2R)-2-hydroxy-1-(hydroxymethyl)-2-(4-nitrophenyl-2,3,5,6-d4) ethyl-2-d]acetamide; 2,2-Dichloro-N-[(1R,2S)-1-deuterio-1,3- dihydroxy-1-(2,3,5,6-tetradeuterio-4-nitrophenyl)propan-2-yl] acetamide;
1.1 ml $360   Add to Cart
77223 erythro-Dihydro-Bupropion-D-Glucuronide
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76795 Erythromycin A (9,11-imino ether)
Synonyms:
Azithromycin impurity R;
1 mg $290   Add to Cart
5 mg $990   Add to Cart
80302 Erythromycin EP Impurity A
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C80303 Erythromycin EP Impurity C (Erythromycin E)
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80304 Erythromycin Impurity E
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80305 Erythromycin Impurity F
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80300 Erythronolide B
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80184 Erythrosine
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80231 Esbiothrin
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C77829 Escitalopram Impurity C
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110197 Esfenvalerate free acid metabolite 10 µg/mL in Cyclohexane
1 ml $352   Add to Cart
80550 Esketamine Impurity B
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C80549 Esketamine Impurity C
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80482 Esmolol Acid Sodium Salt
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80485 Esmolol Dimer
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80484 Esmolol Isopropyl Amide Analog
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110416 Esomeprazole
83981 Esomeprazole Impurity
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