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Alsachim offers you its expertise and know-how in isotope enrichment labeling (13C, 2H, 15N, 18O, 34S) to quantify your compounds by LC-MS/MS analysis. Our teams synthesize labeled internal standards and reference standards, as well as metabolites and building blocks.
608 products
![[reference-standards] Propranolol hydrochloride salt, racemic mixture](https://www.alsachim.com/14923-list_image/Propranolol-hydrochloride-salt-racemic-mixture.jpg)
![[metabolites] 9-cis,13-cis-Retinoic acid](https://www.alsachim.com/14926-list_image/9-cis-13-cis-Retinoic-acid.jpg)
9-cis,13-cis-Retinoic acid
Product Number: C3315
CAS number: 5352-74-9
Synonyms: 9,13-Di-cis-retinoic acid, (9-cis,13-cis)-Retinoic acid
![[reference-standards] Imipenem monohydrate](https://www.alsachim.com/14950-list_image/Imipenem-monohydrate.jpg)
Imipenem monohydrate
Product Number: C2739
CAS number: 74431-23-5
Synonyms: (5R,6S)-3-((2-Formimidamidoethyl)thio)-6-((R)-1-hydroxyethyl)-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid monohydrate, Tienam monohydrate, Primaxin monohydrate
![[metabolites] 4-Hydroxypropranolol hydrochloride salt](https://www.alsachim.com/14951-list_image/4-Hydroxypropranolol-hydrochloride-salt.jpg)
![[metabolites] Norpropranolol hydrochloride salt](https://www.alsachim.com/14952-list_image/Norpropranolol-hydrochloride-salt.jpg)
Norpropranolol hydrochloride salt
Product Number: C1340
CAS number: 62618-09-1
Synonyms: N-Desisopropylpropranolol hydrochloride salt
![[metabolites] 4-Methylpropranolol](https://www.alsachim.com/14953-list_image/4-Methylpropranolol.jpg)
![[metabolites] 4-Hydroxypropranolol sulfate potassium salt](https://www.alsachim.com/14997-list_image/4-Hydroxypropranolol-sulfate-potassium-salt.jpg)
![[metabolites] 4-Hydroxypropranolol-β-D-glucuronide](https://www.alsachim.com/17491-list_image/4-Hydroxypropranolol-beta-D-glucuronide.jpg)
4-Hydroxypropranolol-β-D-glucuronide
Product Number: C1441
CAS number: 94731-13-2
Synonyms: 4-Hydroxypropranolol-beta-D-glucuronide
![[metabolites] Propranolol glucuronide sodium salt](https://www.alsachim.com/14999-list_image/Propranolol-glucuronide-sodium-salt.jpg)
![[reference-standards] Acetaminophen](https://www.alsachim.com/15091-list_image/Acetaminophen.jpg)
Acetaminophen
Product Number: C1609
CAS number: 103-90-2
Synonyms: Acetoaminophenol, N-(4-Hydroxyphenyl)-acetamide, N-Acetyl p-aminophenol, Paracetamol
![[reference-standards] Vancomycin hydrochloride salt](https://www.alsachim.com/15105-list_image/Vancomycin-hydrochloride-salt.jpg)
![[reference-standards] Biotin](https://www.alsachim.com/15205-list_image/Biotin.jpg)
![[reference-standards] trans-Caffeoyl-L-tryptophan sodium salt](https://www.alsachim.com/15282-list_image/trans-Caffeoyl-L-tryptophan-sodium-salt.jpg)
[13C,2H3]-Epinephrine hydrochloride salt, racemic mixture
Product Number: C2238
CAS number: 1261397-10-7 free base
Synonyms: Adrenaline-13C-d3 hydrochloride, racemic mixture
![[metabolites] trans-Caffeoyl-L-tryptophan-methylester](https://www.alsachim.com/15306-list_image/trans-Caffeoyl-L-tryptophan-methylester.jpg)
trans-Caffeoyl-L-tryptophan-methylester
Product Number: C2252
CAS number: N/A
Synonyms: (S,E)-Methyl 2-(3-(3,4-dihydroxyphenyl)acrylamido)-3-(1H-indol-3-yl)propanoate