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| Product | Description | |
|---|---|---|
| Tryptophan Impurity B | Dioxindolyl-L-alanine is used in the synthesis of peptides. Synonyms: Dioxindolyl-L-alanine (Mixture of Diastereomers); (αS)-α-Amino-2,3-dihydro-3-hydroxy-2-oxo-1H-indole-3-propanoic Acid; [3(S)]-α-Amino-2,3-dihydro-3-hydroxy-2-oxo-1H-indole-3-propanoic Acid. CAS No. 184955-21-3. Molecular formula: C11H12N2O4. Mole weight: 236.23. |  |
| Tryptophan Impurity G HCl | 2-Hydroxy L-Tryptophan is a metabolite of Tryptophan produced in the biosynthesis of the neurotransmitters serotonin and melatonin. Synonyms: 2-Hydroxy L-Tryptophan Hydrochloride. CAS No. 881025-90-7. Molecular formula: C11H12N2O3. HCl. Mole weight: 256.69. | |
| Tadalafil Impurity (1,1'-thylidenebistryptophan) | One of the impurities of Tadalafil, which is an inhibitor of phosphodiesterase 5 and could be used in the treatmen of erectile dysfunction. Synonyms: 1,1'-Ethylidenebis[L-tryptophan]; USP Tryptophan Related Compound A; 1,1'-Ethylidenebis-(L-tryptophan), EBT. Grades: > 95%. CAS No. 132685-02-0. Molecular formula: C24H26N4O4. Mole weight: 434.50. | |
| Tryptophan EP Impurity A (Tadalafil Impurity 50) | Tryptophan EP Impurity A (Tadalafil Impurity 50). Uses: For analytical and research use. Group: Impurity standards. CAS No. 132685-02-0. Molecular formula: C24H26N4O4. Mole weight: 434.5. Catalog: APB132685020. |  |
| 4-(2-Aminophenyl)-2-benzamido-2-methyl-4-oxobutanoic Acid | 4-(2-Aminophenyl)-2-benzamido-2-methyl-4-oxobutanoic Acid is an impurity of rac Kyurenine (K661000), a tryptophan metabolite and the precursor of an antagonist of N-methyl-aspartate receptor, Kynurenic acid (K660500). Group: Biochemicals. Grades: Highly Purified. Pack Sizes: 10mg. US Biological Life Sciences. |  Worldwide |
| Daptomycin Isodecy acyl isomer | Daptomycin Isodecy acyl isomer is an impurity of Daptomycin, which is a lipopeptide antibiotic used to treat systemic infections and life-threatening infections caused by gram-positive organisms. Synonyms: Isodecylacyl-Trp-D-Asn-Asp-Thr-Gly-Orn-Asp-D-Ala-Asp-Gly-D-Ser-3Me-Glu-Kyn-OH (ε1-lactone); Daptomycin impurity-32; 1-[N-(8-Methyl-1-oxononyl)-L-tryptophan]daptomycin; Daptomycin, 1-[N-(8-methyl-1-oxononyl)-L-tryptophan]-; N-(8-Methylnonanoyl)-L-tryptophyl-L-asparaginyl-N-[(3S,6S,9R,15S,18R,21S,24S,30S,31R)-3-[2-(2-aminophenyl)-2-oxoethyl]-24-(3-aminopropyl)-15,21-bis(carboxymethyl)-6-[(2R)-1-carboxy-2-propanyl]-9-(hydroxymethyl)-18,31-dimethyl-2,5,8,11,14,17,20,23,26,29-decaoxo-1-oxa-4,7,10,13,16,19,22,25,28-nonaazacyclohentriacontan-30-yl]-L-α-asparagine. CAS No. 1233389-15-5. Molecular formula: C72H101N17O26. Mole weight: 1620.69. | |
| (D-Ser6,Azagly10)-LHRH | Synonyms: (D-Ser6)-Goserelin; Pyr-His-Trp-Ser-Tyr-D-Ser-Leu-Arg-Pro-Azagly-NH2; L-pyroglutamyl-L-histidyl-L-tryptophyl-L-seryl-L-tyrosyl-D-seryl-L-leucyl-L-arginyl-N'-carbamoyl-L-prolinehydrazide; 6-D-Serine-10-deglycinamide-2-(aminocarbonyl)hydrazide Luteinizing hormone-releasing factor (swine); Goserelin Impurity 19; 6-(des-t-Butyl-D-Serine)-Goserelin; 5-Oxo-L-prolyl-L-histidyl-N-[(1S,4S,7R,10S,13S)-18-amino-13-({(2S)-2-[(2-carbamoylhydrazino)carbonyl]-1-pyrrolidinyl}carbonyl)-4-(4-hydroxybenzyl)-1,7-bis(hydroxymethyl)-18-imino-10-isobutyl-2,5,8,11-tetraoxo-3,6,9,12,17-pentaazaoctadec-1-yl]-L-tryptophanamide. Grades: 95%. CAS No. 65807-03-6. Molecular formula: C55H76N18O14. Mole weight: 1213.30. | |
| D-Trp-Leuprolide | D-Trp-Leuprolide is an impurity of Leuprolide, which is a synthetic nonapeptide analog of gonadotropin-releasing hormone used as an antineoplastic agent, a gonadotropin-releasing hormone agonist, and an anti-estrogen. Synonyms: 5-Oxo-L-prolyl-L-histidyl-D-tryptophyl-L-seryl-L-tyrosyl-D-leucyl-L-leucyl-L-arginyl-N-ethyl-L-prolinamide; Pyr-His-D-Trp-Ser-Tyr-D-Leu-Leu-Arg-Pro-NHEt; (S)-N-ethyl-1-(((S)-5-oxopyrrolidine-2-carbonyl)-L-histidyl-D-tryptophyl-L-seryl-L-tyrosyl-D-leucyl-L-leucyl-L-arginyl)pyrrolidine-2-carboxamide; L-Prolinamide, 5-oxo-L-prolyl-L-histidyl-D-tryptophyl-L-seryl-L-tyrosyl-D-leucyl-L-leucyl-L-arginyl-N-ethyl-; 1-9-Luteinizing hormone-releasing factor (swine), 3-D-tryptophan-6-D-leucine-9-(N-ethyl-L-prolinamide)-; Leuprorelin EP Impurity E. Grades: ≥95%. CAS No. 1926163-23-6. Molecular formula: C59H84N16O12. Mole weight: 1209.42. | |
| Leuprolide Acetate EP Impurity E | Leuprolide Acetate EP Impurity E. Uses: For analytical and research use. Group: Impurity standards. Alternative Names: Leuprolide Acetate EP Impurity E, 1-9-Luteinizing hormone-releasing factor (swine), 3-D-tryptophan-6-D-leucine-9-(N-ethyl-L-prolinamide)-,L-Prolinamide, 5-oxo-L-prolyl-L-histidyl-D-tryptophyl-L-seryl-L-tyrosyl-D-leucyl-L-leucyl-L-arginyl-N-ethyl-. CAS No. 1926163-23-6. IUPAC Name: (2S)-N-[(2S)-1-[[(2R)-1-[[(2S)-1-[[(2S)-1-[[(2R)-1-[[(2S)-1-[[(2S)-5-carbamimidamido-1-[(2S)-2-(ethylcarbamoyl)pyrrolidin-1-yl]-1-oxopentan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]amino]-3-(4-hydroxyphenyl)-1-oxopropan-2-yl]amino]-3-hydroxy-1-oxopropan-2-yl]amino]-3-(1H-indol-3-yl)-1-oxopropan-2-yl]amino]-3-(1H-imidazol-4-yl)-1-oxopropan-2-yl]-5-oxopyrrolidine-2-carboxamide. Molecular formula: C59H84N16O12. Mole weight: 1209.40. Catalog: APS1926163236. SMILES: CCNC(=O)[C@@H]1CCCN1C(=O)[C@H](CCCNC(=N)N)NC(=O)[C@H](CC(C)C)NC(=O)[C@@H](CC(C)C)NC(=O)[C@H](Cc2ccc(O)cc2)NC(=O)[C@H](CO)NC(=O)[C@@H](Cc3c[nH]c4ccccc34)NC(=O)[C@H](Cc5c[nH]cn5)NC(=O)[C@@H]6CCC(=O)N6. Format: Neat. | |
| Leuprolide Impurity-12 | Leuprolide Impurity-12 is an impurity of Leuprolide, which is a synthetic nonapeptide analog of gonadotropin-releasing hormone used as an antineoplastic agent, a gonadotropin-releasing hormone agonist, and an anti-estrogen. Synonyms: 5-Oxo-L-prolyl-L-Histidyl-L-Tryptophan; Pyr-His-Trp-OH; Leuprolide (1-3); Leuprolide (m3); L-pyroglutamyl-L-histidyl-L-tryptophan; L-Tryptophan, 5-oxo-L-prolyl-L-histidyl-; L-Tryptophan, N-[N-(5-oxo-L-prolyl)-L-histidyl]-; (Pyro)-L-glutamic acid-L-histidine-L-tryptophan-OH; L-Pyroglu-L-His-L-Trp; LH-RH (1-3). Grades: ≥95%. CAS No. 35925-21-4. Molecular formula: C22H24N6O5. Mole weight: 452.47. | |
| L-Tryptophan Ethyl Ester Hydrochloride | L-Tryptophan Ethyl Ester Hydrochloride. Uses: For analytical and research use. Group: Impurity standards. CAS No. 2899-28-7. IUPAC Name: ethyl (2S)-2-amino-3-(1H-indol-3-yl)propanoate;hydrochloride. Molecular formula: C13H16N2O2.ClH. Mole weight: 268.74. Catalog: APS2899287. SMILES: Cl.CCOC(=O)[C@@H](N)Cc1c[nH]c2ccccc12. Format: Neat. Shipping: Room Temperature. | |
| L-Tryptophan Isopropyl Ester Hydrochloride | L-Tryptophan Isopropyl Ester Hydrochloride. Uses: For analytical and research use. Group: Impurity standards. Alternative Names: L-Tryptophan, 1-methylethyl ester, hydrochloride (1:1),L-Tryptophan Isopropyl Ester Hydrochloride, L-Tryptophan, 1-methylethyl ester, monohydrochloride (9CI). CAS No. 71959-71-2. IUPAC Name: propan-2-yl (2S)-2-amino-3-(1H-indol-3-yl)propanoate;hydrochloride. Molecular formula: C14H18N2O2.ClH. Mole weight: 282.77. Catalog: APS71959712. SMILES: Cl.CC(C)OC(=O)[C@@H](N)Cc1c[nH]c2ccccc12. Format: Neat. Shipping: Room Temperature. | |
| L-Tryptophan Methyl Ester Hydrochloride | L-Tryptophan Methyl Ester Hydrochloride. Uses: For analytical and research use. Group: Impurity standards. CAS No. 7524-52-9. IUPAC Name: methyl (2S)-2-amino-3-(1H-indol-3-yl)propanoate;hydrochloride. Molecular formula: C12H14N2O2.ClH. Mole weight: 254.71. Catalog: APS7524529. SMILES: Cl.COC(=O)[C@@H](N)Cc1c[nH]c2ccccc12. Format: Neat. Shipping: Room Temperature. | |
| rac α-Methyl Kynurenine | rac α-Methyl Kynurenine is an impurity of rac Kyurenine (K661000), a tryptophan metabolite and the precursor of an antagonist of N-methyl-aspartate receptor, Kynurenic acid (K660500). Group: Biochemicals. Grades: Highly Purified. Pack Sizes: 1mg. US Biological Life Sciences. | Worldwide |
| Semaglutide Impurity 2 | Semaglutide Impurity 2 is an impurity of Semaglutide, which is a glucagon-like peptide-1 (GLP-1) receptor agonist used to treat type 2 diabetes. Synonyms: Na-(((9H-fluoren-9-yl)methoxy)carbonyl)-1-(4-((tert-butyldiphenylsilyl)oxy)benzyl)-L-tryptophan. Molecular formula: C49H46N2O5Si. Mole weight: 771.00. | |
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