(RS)-1,1-Dimethoxy-2-propanol
(RS)-1,1-Dimethoxy-2-propanol (CAS 42919-42-6) is a chemical compound with the molecular formula C5H12O3 and a molecular weight of 120.15 g/mol. It is a flammable liquid and an irritant, classified as an acetal/ketal/ortho ester and an alcohol. This versatile building block finds utility in various chemical synthesis applications, serving as a valuable intermediate for the creation of more complex organic molecules within the chemical and pharmaceutical industries.
- IUPAC
- 2-Hydroxypropionaldehyde dimethyl acetal,rac-Lactaldehyde dimethyl acetal
- Synonyms
- 2-Hydroxypropionaldehyde dimethyl acetalrac-Lactaldehyde dimethyl acetal

Organic Synthesis Intermediate
Utilised as a building block in the synthesis of complex organic molecules. Its acetal and alcohol functionalities allow for diverse chemical transformations.
Pharmaceutical Research
Serves as a reagent or intermediate in the research and development of novel pharmaceutical compounds. Its structure can be incorporated into drug candidates.
Specialty Chemicals Production
Employed in the manufacture of specialty chemicals where its specific functional groups are required for targeted synthesis routes.
| Molecular weight | 120.15 |
|---|---|
| Empirical formula | C5H12O3 |
| Assay | ≥97.0% (GC) |


Hazard statements
- H226Flammable liquid and vapour
- H336May cause drowsiness or dizziness
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
| Flash point | 50 °C / 122 °F |
|---|---|
| Transport (UN / ADR) | UN 1993C 3 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 10-67 |
| Safety statements (S) | 36/37 |
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 (RS)-1,1-Dimethoxy-2-propanol used for?
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(RS)-1,1-Dimethoxy-2-propanol is used as a versatile building block and intermediate in organic synthesis, particularly in the chemical and pharmaceutical industries for creating more complex molecules.
What are the CAS number and formula for (RS)-1,1-Dimethoxy-2-propanol?
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The CAS number for (RS)-1,1-Dimethoxy-2-propanol is 42919-42-6, and its molecular formula is C5H12O3.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies (RS)-1,1-Dimethoxy-2-propanol with a minimum assay of ≥97.0% (GC). We do not represent this product as USP, BP, EP, or other pharmacopoeia grades.
What are the primary safety hazards associated with (RS)-1,1-Dimethoxy-2-propanol?
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This compound is a flammable liquid (H226) and may cause drowsiness or dizziness (H336). It requires careful handling in well-ventilated areas, away from ignition sources, and appropriate personal protective equipment should be used. Refer to the Safety Data Sheet for full details.
How is (RS)-1,1-Dimethoxy-2-propanol packed and shipped?
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(RS)-1,1-Dimethoxy-2-propanol is packed and shipped in compliance with relevant regulations for hazardous materials, including UN 1993 for transportation. As a global supplier, TSS adheres to strict export standards.
How can I request a sample or quote for (RS)-1,1-Dimethoxy-2-propanol?
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To request a sample or a quote for (RS)-1,1-Dimethoxy-2-propanol, please contact our sales department via the website or by telephone. Our team will be pleased to assist you.
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