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Penicillin G (potassium salt)
Penicillin G (potassium salt)

Item number: Cay21615-5

Penicillin G is a beta-lactam antibiotic that is effective mainly for Gram-positive bacteria. It has MIC90 values of 0.03, 1, and 4 µg/ml for penicillin-susceptible, -intermediate, and -resistant strains of S. pneumoniae, respectively, and 16-128 µg/ml for various Bacteroides isolates in a broth dilution assay.,...
Keywords: Benzylpenicillin, NSC 131815,...
Application: Beta-lactam antibiotic, Antibacterial cell wall biosynthesis inhibitor
CAS 113-98-4
MW: 372.5 D
From 32.00€ *
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Cloxacillin (sodium salt)
Cloxacillin (sodium salt)

Item number: Cay22249-5

Cloxacillin is a beta-lactam antibiotic and a derivative of oxacillin (Cay-23954). It is active against clinical isolates of the Gram-positive bacteria S. aureus and S. epidermidis (MICs = 0.004-0.4 and 0.1-0.8 µg/ml, respectively) but not 34 Gram-negative bacteria (MICs = >128 µg/ml for all). Cloxacillin binds to...
Keywords: (2S,5R,6R)-6-[[[3-(2-chlorophenyl)-5-methyl-4-isoxazolyl]carbonyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]hept...
Application: Antibacterial antibiotic, Beta-lactamase inhibitor
CAS 642-78-4
MW: 457.9 D
From 74.00€ *
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Methicillin (sodium salt)
Methicillin (sodium salt)

Item number: Cay21007-25

Methicillin is a semisynthetic penicillin antibiotic that can inhibit bacterial cell wall synthesis. It can be used to study methicillin-resistance in S. aureus. Formal Name: (2S,5R,6R)-6-[(2,6-dimethoxybenzoyl)amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid, monosodium salt. CAS...
Keywords: BRL 1241, SQ 16,123, X 1497,...
Application: Antibacterial antibiotic, Cell wall biosynthesis inhibitor
CAS 132-92-3
MW: 402.4 D
From 37.00€ *
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Dicloxacillin (sodium salt hydrate)
Dicloxacillin (sodium salt hydrate)

Item number: Cay23770-1

Dicloxacillin is a semisynthetic penicillin antibiotic that has activity against Gram-positive bacteria (MICs = 0.02-0.24 µg/ml for S. pyogenes, S. aureus, and D. pneumoniae). Dicloxacillin is protective against S. pyogenes, S. aureus, and D. pneumoniae infections in mice when administered subcutaneously or orally...
Keywords: (2S,5R,6R)-6-[[[3-(2,6-dichlorophenyl)-5-methyl-4-isoxazolyl]carbonyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]...
Application: Antibacterial, Cell wall biosynthesis inhibitor
CAS 13412-64-1
MW: 510.3 D
From 57.00€ *
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Ampicillin (sodium salt)
Ampicillin (sodium salt)

Item number: Cay14417-25

Ampicillin is a broad-spectrum antibiotic with activity against Gram-positive and Gram-negative bacteria, including veterinary isolates of S. pseudintermedius, S. aureus, E. coli, Pasteurella, and S. canis (MIC50s = 0.25, 0.5, 2, 0.12, and 0.25 µg/ml, respectively). In vivo, ampicillin (80 mg/kg, i.v.) reduces cough...
Keywords: (2S,5R,6R)-6-[[(2R)-2-amino-2-phenylacetyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid,...
Application: Antibiotic
CAS 69-52-3
MW: 371.4 D
From 43.00€ *
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Nafcillin (sodium salt hydrate)
Nafcillin (sodium salt hydrate)

Item number: Cay21008-1

Nafcillin is a semisynthetic beta-lactam antibiotic that shows resistance to staphylococcal penicillinase. Nafcillin is particularly effective against methicillin-sensitive strains of S. aureus, as shown in animal models and clinical trials. Formal Name:...
Keywords: 6-[[(2-ethoxy-1-naphthalenyl)carbonyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid,...
Application: Antibacterial antibiotic, Cell wall biosynthesis inhibitor
CAS 7177-50-6
MW: 454.5 D
From 69.00€ *
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Amoxicillin (hydrate)
Amoxicillin (hydrate)

Item number: Cay19188-5

Amoxicillin is an orally bioavailable, semisynthetic beta-lactam antibiotic. It inhibits the growth of 30 isolates of P. mirabilis and 89% of 30 E. coli strains when used at concentrations greater than or equal to 5 and 10 µg/ml, respectively, but resistance develops in strains of Klebsiella, Enterobacter, and...
Keywords: (2S,5R,6R)-6-[[(2R)-2-amino-2-(4-hydroxyphenyl)acetyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carbox...
Application: Antibiotic, Antibacterial
CAS 61336-70-7
MW: 419.4 D
From 38.00€ *
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Penicillin V (potassium salt)
Penicillin V (potassium salt)

Item number: Cay23635-10

Penicillin V is a beta-lactam antibiotic that inhibits the growth of bacteria. In vitro, penicillin V inhibits the growth of clinical isolates of Streptococci (MICs = 0.004-0.008 mg/l) and C. difficile (MICs = 1 to >256 mg/l). Penicillin V also inhibits growth of S. aureus in vitro (MIC = 0.016 mg/l) and in vivo in...
Keywords: Phenoxymethylpenicillin,...
Application: Beta-lactam antibiotic
CAS 132-98-9
MW: 388.5 D
From 34.00€ *
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Oxacillin (sodium salt)
Oxacillin (sodium salt)

Item number: Cay23954-1

Oxacillin is a semisynthetic beta-lactam antibiotic. It is active against clinical isolates of methicillin-susceptible S. aureus and penicillin-susceptible S. pneumoniae, as well as group A, group B, and viridans group streptococci with MIC90 values ranging from 0.06 to 2 µg/ml in vitro. Oxacillin is less effective...
Keywords: Micropenin, NSC 527712, SQ16423,...
Application: Antibacterial, Cell wall biosynthesis inhibitor, Beta-lactam antibiotic
CAS 1173-88-2
MW: 423.4 D
From 37.00€ *
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Piperacillin (sodium salt)
Piperacillin (sodium salt)

Item number: Cay20766-500

Piperacillin is a broad-spectrum beta-lactam antibiotic of the penicillin class. It is active against Gram-negative and Gram-positive bacteria, including Enterococcus species, E. coli, and P. mirabilis (MIC50s = 0.5-2 µg/ml) as well as gentamicin-susceptible and -resistant strains of P. aeruginosa (MIC50s = 8 and...
Keywords: CL 227,193, T-1220,...
Application: Antibacterial, Cell wall biosynthesis inhibitor
CAS 59703-84-3
MW: 539.5 D
From 37.00€ *
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Piperacillin-d5
Piperacillin-d5

Item number: Cay25431-500

Piperacillin-d5 is intended for use as an internal standard for the quantification of piperacillin (Cay-20766) by GC- or LC-MS. Piperacillin is a broad-spectrum beta-lactam antibiotic of the penicillin class. It is active against Gram-negative and Gram-positive bacteria, including Enterococcus species, E. coli, and...
Keywords: (2S,5R,6R)-6-((R)-2-(4-(ethyl-d5)-2,3-dioxopiperazine-1-carboxamido)-2-phenylacetamido)-3,3-dimethyl-7-oxo-4-thia-1-azabic...
Application: Antibacterial, Cell wall biosynthesis inhibitor, GC-MS, LC-MS, Internal standard
MW: 522.6 D
From 194.00€ *
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Amoxicillin-d4
Amoxicillin-d4

Item number: Cay25428-500

Amoxicillin-d4 is intended for use as an internal standard for the quantification of amoxicillin (Cay-19188) by GC- or LC-MS. Amoxicillin is an orally bioavailable, semisynthetic beta-lactam antibiotic. It inhibits the growth of 30 isolates of P. mirabilis and 89% of 30 E. coli strains when used at concentrations...
Keywords: (2S,5R,6R)-6-((R)-2-amino-2-(4-hydroxyphenyl-2,3,5,6-d4)acetamido)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-...
Application: Antibiotic, Antibacterial, GC-MS, LC-MS, Internal standard
MW: 369.4 D
From 144.00€ *
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Ampicillin-d5
Ampicillin-d5

Item number: Cay25356-500

Ampicillin-d5 is intended for use as an internal standard for the quantification of ampicillin (Cay-14417) by GC- or LC-MS. Ampicillin is a broad-spectrum antibiotic with activity against Gram-positive and Gram-negative bacteria, including veterinary isolates of S. pseudintermedius, S. aureus, E. coli, Pasteurella,...
Keywords: (2S,5R,6R)-6-[[(2R)-2-amino-2-(phenyl-2,3,4,5,6-d5)acetyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-ca...
Application: Antibiotic, GC-MS, LC-MS, Internal standard
CAS 1426173-65-0
MW: 354.4 D
From 157.00€ *
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Ticarcillin (sodium salt)
Ticarcillin (sodium salt)

Item number: Cay26065-1

Ticarcillin is a semisynthetic beta-lactam antibiotic. It is active against P. aeruginosa, E. coli, P. mirabilis, P. rettgeri, and K. aerogenes (MICs = 4-125 µg/ml). Topical administration of ticarcillin (2.5 mg per eye) reduces P. aeruginosa colony count in rabbit eye. Formulations containing ticarcillin have been...
Keywords: (2S,5R,6R)-6-[[2-carboxy-2-(3-thienyl)acetyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic...
Application: Antibacterial, Cell wall biosynthesis inhibitor
CAS 4697-14-7
MW: 428.4 D
From 44.00€ *
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Penicillin V-d5 (potassium salt)
Penicillin V-d5 (potassium salt)

Item number: Cay26786-1

Penicillin V-d5 is intended for use as an internal standard for the quantification of penicillin V (Cay-23635) by GC- or LC-MS. Penicillin V is a beta-lactam antibiotic that inhibits the growth of bacteria. In vitro, penicillin V inhibits the growth of clinical isolates of Streptococci (MICs = 0.004-0.008 mg/L) and...
Keywords: Phenoxymethylpenicillin-d5,...
Application: GC-MS, LC-MS, Quantification, Internal standard, Beta-lactam antibiotic
MW: 393.5 D
From 60.00€ *
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Carbenicillin (sodium salt)
Carbenicillin (sodium salt)

Item number: Cay20871-5

Carbenicillin is a broad-spectrum carboxypenicillin antibiotic. It is active against Gram-negative and certain Gram-positive bacteria, including S. pyogenes, S. epidermidis, P. mirabilis, P. vulgaris, E. coli, and P. aeruginosa (MICs = 0.19, 1.56, 1.56, 3.12, 3.12, and 50 µg/ml, respectively). It is also active...
Keywords: BRL 2064, CP 15,639-2, NSC 111071, alpha-Carboxybenzylpenicillin,...
Application: Antibacterial antibiotic, Cell wall biosynthesis inhibitor
CAS 4800-94-6
MW: 422.4 D
From 82.00€ *
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Cloxacillin-13C4 (sodium salt)
Cloxacillin-13C4 (sodium salt)

Item number: Cay28801-1

Cloxacillin-13C4 is intended for use as an internal standard for the quantification of cloxacillin (Cay-22249) by GC- or LC-MS. Cloxacillin is a beta-lactam antibiotic and a derivative of oxacillin (Cay-23954). It is active against clinical isolates of the Gram-positive bacteria S. aureus and S. epidermidis (MICs =...
Keywords: (2S,5R,6R)-6-(3-(2-chlorophenyl)-5-(methyl-13C)isoxazole-4-carboxamido-13C)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]h...
Application: GC-MS, LC-MS, Internal standard, Antibiotic, Beta-lactamase inhibitor
MW: 461.8 D
344.00€ *
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Mecillinam
Mecillinam

Item number: Cay9002008-500

Mecillinam is a beta-lactam antibiotic. It is active against Gram-negative bacteria, including E. coli, K. pneumoniae, and N. gonorrhoeae (MIC90s = 4, 8, and 1 µg/ml, respectively). It is also active against clinical isolates of E. coli, K. pneumoniae, and P. mirabilis isolated from human urine. It binds to K....
Keywords: Amdinocillin, FL 1060, Penicillin Hx,...
Application: Beta-lactam antibiotic
CAS 32887-01-7
MW: 325.4 D
From 157.00€ *
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Mezlocillin (sodium salt)
Mezlocillin (sodium salt)

Item number: Cay30691-250

Mezlocillin is a beta-lactam antibiotic and derivative of ampicillin (Cay-14417). It is active against B. fragilis, E. lentum, P. morbillorum, and F. nucleatum (MICs = 8, 4, 2, and 4 µg/ml, respectively). Mezlocillin (32 µg/ml) is also active against 10 strains of S. faecalis. In vivo, mezlocillin (240 mg/kg)...
Keywords: [2S-[2alpha,5alpha,6beta(S*)]]-3,3-dimethyl-6-[[[[[[[3-(methylsulfonyl)-2-oxo-1-imidazolidinyl]carbonyl]amino]carbonyl]ami...
Application: Antibacterial, Beta-lactam antibiotic, Cell wall biosynthesis inhibitor
CAS 59798-30-0
MW: 604.6 D
From 157.00€ *
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Nafcillin-d5 (sodium salt)
Nafcillin-d5 (sodium salt)

Item number: Cay33468-1

Nafcillin-d5 is intended for use as an internal standard for the quantification of nafcillin (Cay-21008) by GC- or LC-MS. Nafcillin is a semisynthetic and penicillinase-resistant penicillin antibiotic. It is active against 20 clinical isolates of S. aureus with minimum bactericidal concentration (MBC) values ranging...
Keywords: (2S,5R,6R)-6-(2-(ethoxy-d5)-1-naphthamido)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate, monosodium...
Application: Internal standard, GC-MS, LC-MS, Quantification, Antibacterial
CAS 1356354-25-0
MW: 441.5 D
124.00€ *
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