Benzophenone-(carbonyl-13C)
Benzophenone-(carbonyl-13C) (CAS: 32488-48-5) is a stable isotope-labelled organic compound with the molecular formula (C6H5)2^13CO and a molecular weight of 183.21 g/mol. It features the carbonyl carbon atom enriched with the 13C isotope. This compound is primarily used as a labelled standard in research and analytical chemistry, particularly in mass spectrometry and metabolic studies, where precise isotopic tracing is required for accurate quantification and pathway analysis.

Isotopic Labelling Studies
Utilised in research settings to trace metabolic pathways or reaction mechanisms due to the specific 13C enrichment. This allows for accurate identification and quantification in complex biological or chemical systems.
Mass Spectrometry Standards
Serves as an internal standard in mass spectrometry for the accurate determination of benzophenone or related compounds. The defined mass shift aids in precise calibration and measurement.
Analytical Chemistry Reagent
Employed as a specialised reagent in various analytical techniques where isotopic labelling provides a unique detection signature. This is crucial for method development and validation.
| Molecular weight | 183.21 |
|---|---|
| Linear formula | (C6H5)213CO |
| Boiling point | 305 °C(lit.) |
| Melting point | 47-51 °C(lit.) |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Flash point | 138 °C / 280.4 °F |
|---|---|
| Water hazard class (WGK, DE) | 2 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38-52/53 |
| Safety statements (S) | 26-61 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Isotopic Purity | 99 atom % 13C |
|---|---|
| Mass Shift | M+1 |
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 Benzophenone-(carbonyl-13C) used for?
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Benzophenone-(carbonyl-13C) is primarily used in isotopic labelling studies, as a standard in mass spectrometry, and as a specialised reagent in analytical chemistry for tracing and quantification.
What are the CAS number and molecular formula?
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The CAS number for Benzophenone-(carbonyl-13C) is 32488-48-5, and its molecular formula is (C6H5)2^13CO.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Benzophenone-(carbonyl-13C) with a guaranteed isotopic purity of 99 atom % 13C. We do not represent this product as USP, BP, or EP grade.
How should Benzophenone-(carbonyl-13C) be handled safely?
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Benzophenone-(carbonyl-13C) is a warning hazardous substance. It may cause skin irritation (H315), serious eye irritation (H319), and respiratory irritation (H335). Handle with appropriate personal protective equipment in a well-ventilated area, avoiding dust formation and inhalation. Consult the Safety Data Sheet for full details.
How is this chemical packed, shipped, and exported?
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Tech Serve Solutions packs, ships, and exports chemicals adhering to all relevant international regulations for hazardous materials. Specific packaging details are available upon request.
How can I request a sample or quote?
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To request a sample or a quote for Benzophenone-(carbonyl-13C), please contact our sales team through the website or by calling our office, providing your specific requirements.
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