2,5-Dihydroxy-1,4-dithiane
Synonym(s):1,4-Dithiane-2,5-diol;2,5-Dihydroxy-1,4-dithiane;Dithian;Mercaptoacetaldehyde dimer
- CAS NO.:40018-26-6
- Empirical Formula: C4H8O2S2
- Molecular Weight: 152.24
- MDL number: MFCD00006659
- EINECS: 254-751-6
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-04-03 14:17:14
What is 2,5-Dihydroxy-1,4-dithiane?
Chemical properties
white to yellowish crystalline powder
Chemical properties
2,5-Dihydroxy-1,4-dithiane has a sulfurous, meaty, toasted bread-like odor
The Uses of 2,5-Dihydroxy-1,4-dithiane
1,4-Dithiane-2,5-diol is a hydroxylated dithiane derivative with phytogrowth-inhibitory and antibacterial activities.
The Uses of 2,5-Dihydroxy-1,4-dithiane
1,4-Dithiane-2,5-diol was used in the synthesis of:
- substituted tetrahydrothiophene derivatives
- 2-amino-3-(arylsulfonyl)thiophenes, potential antiviral and antitumor agents
Definition
ChEBI: 1,4-Dithiane-2,5-diol is a member of dithianes.
Aroma threshold values
Aroma characteristics at 0.1% EtoH: sulfurous, grilled meaty, pungent, brothy, eggy, heavy and rich, toasted bread, tomato
Taste threshold values
Taste characteristics at 0.25 to 10 ppm: metallic, meaty savory chicken and beef, sulfurous, egg-yolk-like
Synthesis Reference(s)
Synthetic Communications, 14, p. 483, 1984 DOI: 10.1080/00397918408059569
General Description
1,4-Dithiane-2,5-diol undergoes bifunctional squaramide catalyzed sulfa-Michael/aldol cascade reaction with chalcones to afford trisubstituted tetrahydrothiophenes. It participates in diastereoselective [3+3] cycloaddition with azomethine imines catalyzed by 1,4-diazabicyclo[2.2.2]octane. It is a mercaptoacetaldehyde dimer and an efficient synthon for incorporating a thiol group to in situ generated nitroalkenes.
Properties of 2,5-Dihydroxy-1,4-dithiane
| Melting point: | 130 °C (dec.) (lit.) |
| Boiling point: | 244.73°C (rough estimate) |
| Density | 1.224 (estimate) |
| vapor pressure | 0Pa at 25℃ |
| refractive index | 1.5200 (estimate) |
| FEMA | 3826 | 2,5-DIHYDROXY-1,4-DITHIANE |
| storage temp. | 2-8°C |
| solubility | H2O: 0.39% at 20 °C |
| form | Crystalline Powder |
| pka | 12.04±0.40(Predicted) |
| color | White to yellow |
| PH | 4.9 (3.9g/l, H2O) |
| Odor | at 0.10 % in propylene glycol. sulfury meaty toasted bread broth egg tomato |
| Water Solubility | 3.9 g/L (20 ºC) |
| JECFA Number | 550 |
| BRN | 104402 |
| CAS DataBase Reference | 40018-26-6(CAS DataBase Reference) |
Safety information for 2,5-Dihydroxy-1,4-dithiane
| Signal word | Danger |
| Pictogram(s) |
![]() Skull and Crossbones Acute Toxicity GHS06 ![]() Health Hazard GHS08 ![]() Environment GHS09 |
| GHS Hazard Statements |
H301:Acute toxicity,oral H317:Sensitisation, Skin H330:Acute toxicity,inhalation H373:Specific target organ toxicity, repeated exposure H410:Hazardous to the aquatic environment, long-term hazard |
| Precautionary Statement Codes |
P260:Do not breathe dust/fume/gas/mist/vapours/spray. P273:Avoid release to the environment. P280:Wear protective gloves/protective clothing/eye protection/face protection. P314:Get medical advice/attention if you feel unwell. P302+P352:IF ON SKIN: wash with plenty of soap and water. |
Computed Descriptors for 2,5-Dihydroxy-1,4-dithiane
| InChIKey | YUIOPHXTILULQC-UHFFFAOYSA-N |
2,5-Dihydroxy-1,4-dithiane manufacturer
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