1H-Pyrazole-3-boronic acid pinacol ester - ≥95% , CAS No.844501-71-9

CAS: 844501-71-9 Cat. No.: H137701 Molecular Weight: 194.04 EC Number: 677-031-7
AVAILABLE TO ORDER
GRADE & PURITY ≥95%
Synonyms
3-(4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLANE)-PYRAZOLE | NINDS_000221 | Pyrazole-3-boronic acid, pinacol ester | 1H-Pyrazole,5-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)- | 1H-Pyrazole-3-boronicacidpinacolester | AB00637124-07 | EN300-212588 | 1H-Pyrazo
Storage
Room temperature,Argon charged,Desiccated,Cool
Shipped In
Normal
Size
Status
Price
Qty
1g
H137701-1g
8
$9.90
5g
H137701-5g
2

$13.90

$15.90
Save $2.00 (12.58%)
25g
H137701-25g
8-12 wks(?) Production requires sourcing of materials. We appreciate your patience and understanding.

$37.90

$63.90
Save $26.00 (40.69%)
100g
H137701-100g
8-12 wks(?) Production requires sourcing of materials. We appreciate your patience and understanding.

$150.90

$215.90
Save $65.00 (30.11%)
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Why this grade

≥95% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

🌡

Storage & shipping

Room temperature,Argon charged,Desiccated,Cool Ships Normal 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
3-(4, 4, 5, 5-TETRAMETHYL-1, 3, 2-DIOXABOROLANE)-PYRAZOLE | NINDS_000221 | Pyrazole-3-boronic acid, pinacol ester | 1H-Pyrazole, 5-(4, 4, 5, 5-tetramethyl-[1, 3, 2]dioxaborolan-2-yl)- | 1H-Pyrazole-3-boronicacidpinacolester | AB00637124-07 | EN300-212588 | 1H-Pyrazo
Specifications & Purity
≥95%
Storage
Room temperature, Argon charged, Desiccated, Cool
Shipped In
Normal
Purity
≥95%
Names and Identifiers
Pubchem Sid488199981
Pubchem Sid Urlhttps://pubchem.ncbi.nlm.nih.gov/substance/488199981
Canonical SmilesB1(OC(C(O1)(C)C)(C)C)C2=CC=NN2
IUPAC Name5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole
InChIKeyKWLOIDOKWUESNM-UHFFFAOYSA-N
INCHI1S/C9H15BN2O2/c1-8(2)9(3,4)14-10(13-8)7-5-6-11-12-7/h5-6H,1-4H3,(H,11,12)
Isomeric SMILES B1(OC(C(O1)(C)C)(C)C)C2=CC=NN2
Molecular Weight 194.04
Reaxy-Rn 20923675
Reaxys-RN_link_address https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=20923675&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.

Look up COA →

📊 Datasheet

Quick-reference summary of product specifications and applications.

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🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

View spec sheet →

Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomOrganic compounds
SuperclassOrganic acids and derivatives
ClassBoronic acid derivatives
SubclassBoronic acid esters
Intermediate Tree Nodes Not available
Direct ParentBoronic acid esters
Alternative Parents Pyrazoles  Heteroaromatic compounds  Dioxaborolanes  Oxacyclic compounds  Organic metalloid salts  Azacyclic compounds  Organooxygen compounds  Organonitrogen compounds  Organometalloid compounds  Hydrocarbon derivatives  
Molecular FrameworkAromatic heteromonocyclic compounds
Substituents Azole - Boronic acid ester - 1,3,2-dioxaborolane - Heteroaromatic compound - Pyrazole - Oxacycle - Organoheterocyclic compound - Organic metalloid salt - Azacycle - Organooxygen compound - Organonitrogen compound - Organic metalloid moeity - Organic nitrogen compound - Organic oxygen compound - Hydrocarbon derivative - Aromatic heteromonocyclic compound
DescriptionThis compound belongs to the class of organic compounds known as boronic acid esters. These are compounds comprising the boronic acid ester functional group RN(X)OR' (R,R'=alkyl, aryl; X= any O, N, Hal residue).
External Descriptors Not available
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.

5 results found

Lot NumberCertificate TypeDateItem
E1927027Certificate of AnalysisJul 07, 2026 H137701
A2628476Certificate of AnalysisJan 19, 2026 H137701
A2628477Certificate of AnalysisJan 19, 2026 H137701
A2628478Certificate of AnalysisJan 19, 2026 H137701
D23142419Certificate of AnalysisFeb 19, 2025 H137701
Chemical and Physical Properties
SolubilityInsoluble in water
Sensitivityair sensitive
Melt Point(°C)105.0-109.0℃
Molecular Weight194.040 g/mol
XLogP3
Hydrogen Bond Donor Count1
Hydrogen Bond Acceptor Count3
Rotatable Bond Count1
Exact Mass194.123 Da
Monoisotopic Mass194.123 Da
Topological Polar Surface Area47.100 Ų
Heavy Atom Count14
Formal Charge0
Complexity217.000
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count1
Documents & Articles
Solution Calculators
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