Acetic acid-13C2,d4
Acetic acid-13C2,d4 (CAS 402835-82-9; linear formula ¹³CD₃¹³CO₂D; molecular weight 66.06) is a fully labelled stable-isotope form of acetic acid in which both carbon atoms are ¹³C and the methyl and acid hydrogens are deuterium. Supplied with high isotopic enrichment (99 atom % ¹³C, 98 atom % D), it is a corrosive, flammable liquid used chiefly as an internal standard and metabolic tracer in NMR, mass spectrometry and isotope-labelling research.
- Synonyms
- Acetic acid-13C2,d4¹³CD₃¹³CO₂DAcetic acid (13C2, d4)Acetic-13C2 acid-d4fully labelled acetic acid (13C2,d4)deuterated 13C-labelled acetic acid

Internal standard for mass spectrometry
The M+6 mass shift separates this labelled acetic acid from its unlabelled counterpart, making it a useful internal standard for quantitative LC-MS and GC-MS. It supports accurate quantification of acetate and related analytes.
Stable-isotope tracer in metabolic studies
Dual ¹³C and deuterium labelling allows acetate uptake and incorporation to be traced through metabolic and biochemical pathways. It is applied in research on lipid, energy and intermediary metabolism.
NMR spectroscopy reference and probe
The ¹³C enrichment gives strong, well-defined NMR signals for use as a reference and in mechanistic and structural studies. It assists tracking of acetyl and acetate groups in labelled molecules.
Synthesis of isotopically labelled compounds
As a fully labelled C2 building block, it is used to prepare ¹³C- and deuterium-labelled acetyl derivatives and downstream reagents. This underpins the production of tracers and analytical standards.
| Molecular weight | 66.06 |
|---|---|
| Linear formula | 13CD313CO2D |
| Boiling point | 117-118 °C(lit.) |
| Density | 1.153 g/mL at 25 °C |
| Melting point | 16.2 °C(lit.) |


Hazard statements
- H226Flammable liquid and vapour
- H314Causes severe skin burns and eye damage
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Flash point | 40 °C / 104 °F |
|---|---|
| Transport (UN / ADR) | UN 2789 8/PG 2 |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | C |
| Risk statements (R) | 10-35 |
| Safety statements (S) | 23-26-45 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Isotopic Purity | 99 atom % 13C98 atom % D |
|---|---|
| Mol Wt | mol wt 65.96 by atom % calculation |
| Mass Shift | M+6 |
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 Acetic acid-13C2,d4 used for?
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It is used mainly as a stable-isotope internal standard and metabolic tracer. The combined ¹³C and deuterium labelling and M+6 mass shift make it valuable in NMR, LC-MS and GC-MS work, in tracer studies of acetate metabolism, and as a labelled building block for synthesising other isotope-labelled compounds.
What is the CAS number and molecular formula of Acetic acid-13C2,d4?
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The CAS number is 402835-82-9 and the linear formula is ¹³CD₃¹³CO₂D — acetic acid with both carbons as ¹³C and four deuterium atoms. The molecular weight is 66.06 (about 65.96 by atom % calculation), with a boiling point of 117–118 °C and a density of 1.153 g/mL at 25 °C.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Acetic acid-13C2,d4 as a research- and reagent-grade stable-isotope-labelled product with isotopic enrichment of 99 atom % ¹³C and 98 atom % D. We do not represent it as a USP, BP or EP pharmacopoeia grade. Documentation can be provided to confirm the labelling specification supplied with each batch.
What are the safety and handling requirements for Acetic acid-13C2,d4?
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It is classified as a flammable liquid and is corrosive (GHS02, GHS05; signal word Danger). The hazard statements are H226 (flammable liquid and vapour) and H314 (causes severe skin burns and eye damage). Handle away from heat and ignition sources, use suitable eye protection and gloves, and consult the Safety Data Sheet before use.
How is Acetic acid-13C2,d4 packed, shipped and exported?
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It is packed in sealed, compatible containers appropriate to the order quantity and labelled to GHS requirements. For transport it is classified under UN 2789, Class 8, Packing Group II, and is shipped with full export documentation to comply with dangerous-goods regulations for international delivery.
How do I request a sample or quote?
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Contact Tech Serve Solutions with your required quantity, packaging and destination, and our team will respond with availability, lead time and a quotation. Sample requests for evaluation can be arranged subject to availability and applicable transport requirements.
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