Entecavir Hydrate - ≥99% , CAS No.209216-23-9

CAS: 209216-23-9 Cat. No.: E129807 Molecular Weight: 295.29 EC Number: 606-668-5
AVAILABLE TO ORDER
GRADE & PURITY ≥99%
Synonyms
(4-chlorophenyl)sulfanylmethylsulfanyl-diethoxy-sulfanylidene-lambda5-phosphane | 6H-Purin-6-one, 2-amino-1,9-dihydro-9-((1S,3R,4S)-4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl)-, monohydrate | DS-0549 | erythro | YXPVEXCTPGULBZ-WQYNNSOESA-N | AM902
Storage
Store at -20°C
Shipped In
Ice chest + Ice pads
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Size
Status
Price
Qty
5mg
E129807-5mg
3
$9.90
10mg
E129807-10mg
3
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50mg
E129807-50mg
3

$20.90

$31.90
Save $11.00 (34.48%)
250mg
E129807-250mg
2

$99.90

$149.90
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1g
E129807-1g
2

$120.90

$181.90
Save $61.00 (33.53%)
5g
E129807-5g
8-12 wks(?) Production requires sourcing of materials. We appreciate your patience and understanding.

$497.90

$746.90
Save $249.00 (33.34%)
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Why this grade

≥99% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

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Storage & shipping

Store at -20°C Ships Ice chest + Ice pads Check lot-specific COA for exact specifications.

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Quality documents

SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.

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Literature proof

Cited in 0 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Specifications

Synonyms
(4-chlorophenyl)sulfanylmethylsulfanyl-diethoxy-sulfanylidene-lambda5-phosphane | 6H-Purin-6-one, 2-amino-1, 9-dihydro-9-((1S, 3R, 4S)-4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl)-, monohydrate | DS-0549 | erythro | YXPVEXCTPGULBZ-WQYNNSOESA-N | AM902
Specifications & Purity
≥99%
Storage
Store at -20°C
Shipped In
Ice chest + Ice pads
This product requires cold chain shipping. Ground and other economy services are not available.
Action Type
INHIBITOR
Purity
≥99%
Names and Identifiers
Pubchem Sid504773373
Pubchem Sid Urlhttps://pubchem.ncbi.nlm.nih.gov/substance/504773373
Canonical SmilesC=C1C(CC(C1CO)O)N2C=NC3=C2N=C(NC3=O)N.O
IUPAC Name2-amino-9-[(1S,3R,4S)-4-hydroxy-3-(hydroxymethyl)-2-methylidenecyclopentyl]-1H-purin-6-one;hydrate
InChIKeyYXPVEXCTPGULBZ-WQYNNSOESA-N
INCHI1S/C12H15N5O3.H2O/c1-5-6(3-18)8(19)2-7(5)17-4-14-9-10(17)15-12(13)16-11(9)20;/h4,6-8,18-19H,1-3H2,(H3,13,15,16,20);1H2/t6-,7-,8-;/m0./s1
Isomeric SMILES C=C1[C@H](C[C@@H]([C@H]1CO)O)N2C=NC3=C2N=C(NC3=O)N.O
Molecular Weight 295.29
Reaxy-Rn 37080778
Reaxys-RN_link_address https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=37080778&ln=

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

Download SDS →

✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

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📊 Datasheet

Quick-reference summary of product specifications and applications.

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🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

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Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomOrganic compounds
SuperclassNucleosides, nucleotides, and analogues
ClassNucleoside and nucleotide analogues
SubclassNot available
Intermediate Tree Nodes Not available
Direct ParentNucleoside and nucleotide analogues
Alternative Parents Hypoxanthines  6-oxopurines  Pyrimidones  Aminopyrimidines and derivatives  N-substituted imidazoles  Cyclopentanols  Vinylogous amides  Heteroaromatic compounds  Cyclic alcohols and derivatives  Azacyclic compounds  Primary amines  Primary alcohols  Organopnictogen compounds  Organic oxides  Hydrocarbon derivatives  
Molecular FrameworkAromatic heteropolycyclic compounds
Substituents 6-oxopurine - Hypoxanthine - Purinone - Purine - Imidazopyrimidine - Aminopyrimidine - Pyrimidone - Cyclopentanol - Pyrimidine - N-substituted imidazole - Azole - Cyclic alcohol - Heteroaromatic compound - Imidazole - Vinylogous amide - Secondary alcohol - Azacycle - Organoheterocyclic compound - Primary alcohol - Primary amine - Alcohol - Organic nitrogen compound - Hydrocarbon derivative - Organic oxide - Organopnictogen compound - Organic oxygen compound - Amine - Organonitrogen compound - Organooxygen compound - Aromatic heteropolycyclic compound
DescriptionThis compound belongs to the class of organic compounds known as nucleoside and nucleotide analogues. These are analogues of nucleosides and nucleotides. These include phosphonated nucleosides, C-glycosylated nucleoside bases, analogues where the sugar unit is a pyranose, and carbocyclic nucleosides, among others.
External Descriptors hydrate
3D Structure
Interactive Chemical Structure Model





Certificates(CoA,COO,BSE/TSE and Analysis Chart)
C of A & Other Certificates(BSE/TSE, COO):
Analytical Chart:

Find and download the COA for your product by matching the lot number on the packaging.

7 results found

Lot NumberCertificate TypeDateItem
C2624012Certificate of AnalysisApr 07, 2026 E129807
B2225302Certificate of AnalysisSep 09, 2025 E129807
B2225304Certificate of AnalysisSep 09, 2025 E129807
B2225313Certificate of AnalysisSep 09, 2025 E129807
K2110743Certificate of AnalysisMay 09, 2025 E129807
K2110749Certificate of AnalysisAug 16, 2023 E129807
F1918052Certificate of AnalysisFeb 03, 2023 E129807
Chemical and Physical Properties
SolubilityDMSO 59 mg/mL Water <1 mg/mL Ethanol <1 mg/mL
Specific Rotation[α]36° (C=0.25,H2O)
Melt Point(°C)259 °C(dec.)
Molecular Weight295.290 g/mol
XLogP3
Hydrogen Bond Donor Count5
Hydrogen Bond Acceptor Count6
Rotatable Bond Count2
Exact Mass295.128 Da
Monoisotopic Mass295.128 Da
Topological Polar Surface Area127.000 Ų
Heavy Atom Count21
Formal Charge0
Complexity480.000
Isotope Atom Count0
Defined Atom Stereocenter Count3
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count2
Documents & Articles
Solution Calculators
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