EPA Methods Standards

Crescent Chemical Co Inc PYMETROZINE 100 MG

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Pymetrozine Insecticide (WS) CAS 123312-89-0 Molecular Weight - 217.2272 Storage - RT Catalog Num - DRE-C16587000 pesticide

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Crescent Chemical Co Inc ATRAZINEDESETHYLDESISOPROP 1ML

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Atrazine-desethyl-desisopropyl Single Component Calibration Standard in Ethylacetate CAS 3397-62-4 Size - 1mL Catalog Number - 8410EA

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Crescent Chemical Co Inc QUINOLINE-D7 SOLN 1ML

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Quinoline-d7 Single Component Calibration Standard in Dichloromethane at 100 ug/mL 1mL

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Crescent Chemical Co Inc CRESCENT CHEMICAL CO INC

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NC3910704 525 SURROGATE 1 COMP PYRIDINE

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Crescent Chemical Co Inc EPA 8270 TUNING 50PPM 4COMP1ML

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CLP Semivolatiles Complete Priority Pollutants Kits - GCMS Tuning Standard, 4 components Benzidine, DFTPP, p,p CAS Size - 1mL Catalog Number - CC2140

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Crescent Chemical Co Inc EPA 625 PYRIDINE D5 2MG/ML 1ML

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EPA Method 625 - Individual Internal and Surrogate Standard, 1 component Pyridine d5 CAS Size - 1mL Catalog Number - CC2138O.10

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Crescent Chemical Co Inc TETRACYCLINE HCL 250 MG

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Tetracycline hydrochloride Pharma./veter. comp. (WS) CAS 64-75-5 Molecular Weight - 480.8955 Storage - +5°C Catalog Num - DRE-C17396150 chemical

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eMolecules​ 118292-40-3 | Ambeed | Ethyl 6-((44-dimethylthiochroman-6-yl)ethynyl)nicotinate | 25mg | 570569325 | A357060 | MFCD00867628 | 351.46 | C21H21NO2S

Medchem Express | QM295 | 5mg | 778475840 | HY-148520 | 1241046-32-1 | 295.294 | C17H13NO4

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eMolecules​ AstaTech / 5-(4-NITRO-PHENYL)-OXAZOLE-4-CARBOXYLIC ACID ETHYL ESTER / 1g / 112536086 / E58696 / 97.000 / 72030-87-6 / MFCD02179429 / 262.221 / C12H10N2O5

AstaTech / 5-(4-NITRO-PHENYL)-OXAZOLE-4-CARBOXYLIC ACID ETHYL ESTER / 1g / 112536086 / E58696 / 97.000 / 72030-87-6 / MFCD02179429 / 262.221 / C12H10N2O5

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ERA WATERS CORP SEMIVOLATILES 1 POTABLEWATR

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NC3495875 SEMIVOLATILES 1 POTABLEWATR

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Crescent Chemical Co Inc EPA 502.2 INTERN STD 3COMP 1ML

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EPA Method 524.2 -lnternal Standards, 3 Components 2-Bromo-1-chloropropane, Fluorobenzene, Methylene chloride d2 CAS Size - 1mL Catalog Number - CC2014

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Medchemexpress LLC WNT3A SURROGATE HUM 20UG

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5000184667 WNT3A SURROGATE HUM 20UG

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Perkin Elmer US LLC Ketones for Method 8260B

We offer standard solutions to meet your environmental analysis requirements.

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Medchemexpress LLC Wnt3a Surrogate Hum 5ug

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Recombinant human Wnt3a surrogate protein (HEK293, Fc) is a water-soluble, Fc-fused Wnt agonist engineered to provide Fzd isoform-selective activation of canonical Wnt signaling. Expressed in HEK293 cells to preserve human-like post-translational modifications, the surrogate serves as a defined, consistent Wnt source for organoid culture, stem cell maintenance, and in vitro signaling assays.

• Water-soluble Fc-fused surrogate for simplified handling and solubility
• Fzd isoform-selective activation enables tissue-relevant Wnt signaling
• Expressed in HEK293 cells to support human-like post-translational modifications
• Supports organoid expansion and stem cell maintenance in culture
• Available in defined microgram quantities for assay flexibility
• Reduces variability compared with lipidated Wnt or conditioned media

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Crescent Chemical Co Inc ENDRIN 100 MG

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Endrin Insecticide (WS) CAS 72-20-8 Molecular Weight - 380.9093 Storage - RT Catalog Num - DRE-C13160000 pesticide

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