1909-91-7 Isocupressic acid 1-Naphthalenecarboxylic acid, decahydro-5-(5-hydroxy-3-methyl-3-pentenyl)-1,4a-dimethyl-6-methylene-, (1S-(1alpha,4aalpha,5alpha(E),8abeta))- 1-Naphthalenecarboxylic acid, decahydro-5-((3E)-5-hydroxy-3-methyl-3-pentenyl)-1,4a-dimethyl-6-methylene-, (1S,4aR,5S,8aR)- 15-Hydroxylabda-8(17),13-dien-19-oic acid CAS 1909-91-7

Purity 97%+In StockPharmaceutical Standards
CAS No.1909-91-7
Molecular FormulaC20H32O3
Molecular Weight320.47 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

1909-91-7 Isocupressic acid 1-Naphthalenecarboxylic acid, decahydro-5-(5-hydroxy-3-methyl-3-pentenyl)-1,4a-dimethyl-6-methylene-, (1S-(1alpha,4aalpha,5alpha(E),8abeta))- 1-Naphthalenecarboxylic acid, decahydro-5-((3E)-5-hydroxy-3-methyl-3-pentenyl)-1,4a-dimethyl-6-methylene-, (1S,4aR,5S,8aR)- 15-Hydroxylabda-8(17),13-dien-19-oic acid CAS 1909-91-7 chemical structure

Description

The molecular framework of 1909-91-7 Isocupressic acid 1-Naphthalenecarboxylic acid, decahydro-5-(5-hydroxy-3-methyl-3-pentenyl)-1,4a-dimethyl-6-methylene-, (1S-(1alpha,4aalpha,5alpha(E),8abeta))- 1-Naphthalenecarboxylic acid, decahydro-5-((3E)-5-hydroxy-3-methyl-3-pentenyl)-1,4a-dimethyl-6-methylene-, (1S,4aR,5S,8aR)- 15-Hydroxylabda-8(17),13-dien-19-oic acid (C20H32O3) is characterized by a steroid core, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.

1909-91-7 Isocupressic acid 1-Naphthalenecarboxylic acid, decahydro-5-(5-hydroxy-3-methyl-3-pentenyl)-1,4a-dimethyl-6-methylene-, (1S-(1alpha,4aalpha,5alpha(E),8abeta))- 1-Naphthalenecarboxylic acid, decahydro-5-((3E)-5-hydroxy-3-methyl-3-pentenyl)-1,4a-dimethyl-6-methylene-, (1S,4aR,5S,8aR)- 15-Hydroxylabda-8(17),13-dien-19-oic acid (CAS 1909-91-7) is a high-purity analytical reference standard with the molecular formula C20H32O3 and a molecular weight of 320.47 g/mol.

This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.

As a certified reference material (CRM), 1909-91-7 Isocupressic acid 1-Naphthalenecarboxylic acid, decahydro-5-(5-hydroxy-3-methyl-3-pentenyl)-1,4a-dimethyl-6-methylene-, (1S-(1alpha,4aalpha,5alpha(E),8abeta))- 1-Naphthalenecarboxylic acid, decahydro-5-((3E)-5-hydroxy-3-methyl-3-pentenyl)-1,4a-dimethyl-6-methylene-, (1S,4aR,5S,8aR)- 15-Hydroxylabda-8(17),13-dien-19-oic acid meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.

Physical & Chemical Properties

Molecular FormulaC20H32O3
Molecular Weight320.47 g/mol
AppearanceOff-white to pale yellow crystalline powder
Purity97%+
StorageStore at room temperature, keep sealed and dry
Solubility (reference)Soluble in chloroform, dichloromethane, ethyl acetate, DMSO
StabilityMay oxidize slowly on prolonged air exposure
Degree of Unsaturation (DBE)5.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1957

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