(S)-(+)-2,3,7,7a-Tetrahydro-7a-methyl-1H-indene-1,5(6H)-dione
(S)-(+)-2,3,7,7a-Tetrahydro-7a-methyl-1H-indene-1,5(6H)-dione (CAS: 17553-86-5), with the molecular formula C10H12O2 and a molecular weight of 164.20, is a valuable chiral building block. This diketone finds application in asymmetric synthesis and general chemical synthesis. Its specific stereochemistry makes it a key intermediate for constructing complex chiral molecules in various research and development settings. Available from Tech Serve Solutions with 97% purity.
- IUPAC
- (+)-7,7a-Dihydro-7α, β-methyl-1,5(6H)-indandione,(+)-5,6,7,8-Tetrahydro-8-methylindan-1,5-dione,(S)-(+)-Hajos-Parrish diketone,(S)-Hajos dione,(S)-Hajos ketone,(S)-Hajos-Wiechert ketone
- Synonyms
- (+)-7,7a-Dihydro-7α, β-methyl-1,5(6H)-indandione(+)-5,6,7,8-Tetrahydro-8-methylindan-1,5-dione(S)-(+)-Hajos-Parrish diketone(S)-Hajos dione(S)-Hajos ketone(S)-Hajos-Wiechert ketone

Asymmetric Synthesis
This compound serves as a crucial chiral building block in asymmetric synthesis, enabling the stereoselective construction of complex molecules. Its inherent chirality is leveraged to control the stereochemical outcome of synthetic transformations.
Chemical Synthesis Intermediate
As a versatile intermediate, it is employed in multi-step organic synthesis pathways. Researchers utilise its diketone functionality for further derivatisation and elaboration into target compounds.
Chiral Molecule Development
It is instrumental in the development of novel chiral molecules for various research fields, including pharmaceuticals and materials science. Its structure provides a well-defined stereochemical starting point.
| Molecular weight | 164.20 |
|---|---|
| Empirical formula | C10H12O2 |
| Assay | 97% |
| Melting point | 57-64 °C |

Hazard statements
- H301Toxic if swallowed
- H315Causes skin irritation
- H317May cause an allergic skin reaction
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- P301IF SWALLOWED
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Faceshields, Gloves |
|---|---|
| Transport (UN / ADR) | UN 2811 6.1 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-36/37/38-43 |
| Safety statements (S) | 26-39 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is (S)-(+)-2,3,7,7a-Tetrahydro-7a-methyl-1H-indene-1,5(6H)-dione used for?
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This compound is primarily used as a chiral building block in asymmetric synthesis and as an intermediate in general chemical synthesis for the development of complex chiral molecules.
What is the CAS number and molecular formula?
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The CAS number is 17553-86-5 and the molecular formula is C10H12O2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies this compound with an assay of 97%. It is considered a technical or research grade material and is not represented as USP, BP, or EP grade.
How should (S)-(+)-2,3,7,7a-Tetrahydro-7a-methyl-1H-indene-1,5(6H)-dione be handled safely?
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This compound is classified as Danger, with hazards including H301 (Toxic if swallowed), H315 (Causes skin irritation), H317 (May cause an allergic skin reaction), H319 (Causes serious eye irritation), and H335 (May cause respiratory irritation). Appropriate personal protective equipment, including a dust mask type N95 (US), eyeshields, faceshields, and gloves, must be used. Ensure adequate ventilation.
How is this chemical packed and shipped?
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This chemical is packed according to international transport regulations, including UN 2811 6.1 / PGIII for international shipment. Tech Serve Solutions exports fine chemicals globally.
How can I request a sample or quote?
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To request a sample or obtain a quotation, please contact our sales team through the Tech Serve Solutions website or by phone.
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