Squaric acid
Squaric acid structure
|
Common Name | Squaric acid | ||
|---|---|---|---|---|
| CAS Number | 2892-51-5 | Molecular Weight | 114.056 | |
| Density | 2.4±0.1 g/cm3 | Boiling Point | 251.0±50.0 °C at 760 mmHg | |
| Molecular Formula | C4H2O4 | Melting Point | >300 °C(lit.) | |
| MSDS | Chinese USA | Flash Point | 119.8±26.6 °C | |
| Symbol |
GHS07 |
Signal Word | Warning | |
| Name | squaric acid |
|---|---|
| Synonym | More Synonyms |
| Density | 2.4±0.1 g/cm3 |
|---|---|
| Boiling Point | 251.0±50.0 °C at 760 mmHg |
| Melting Point | >300 °C(lit.) |
| Molecular Formula | C4H2O4 |
| Molecular Weight | 114.056 |
| Flash Point | 119.8±26.6 °C |
| Exact Mass | 113.995308 |
| PSA | 74.60000 |
| LogP | -1.70 |
| Vapour Pressure | 0.0±1.1 mmHg at 25°C |
| Index of Refraction | 1.872 |
| Storage condition | -20°C |
| Water Solubility | 20 g/L (30 ºC) |
CHEMICAL IDENTIFICATION
HEALTH HAZARD DATAACUTE TOXICITY DATA
|
| Symbol |
GHS07 |
|---|---|
| Signal Word | Warning |
| Hazard Statements | H315-H317-H319-H335 |
| Precautionary Statements | P261-P280-P305 + P351 + P338 |
| Personal Protective Equipment | dust mask type N95 (US);Eyeshields;Faceshields;Gloves |
| Hazard Codes | Xi |
| Risk Phrases | R36/37/38:Irritating to eyes, respiratory system and skin . R43:May cause sensitization by skin contact. |
| Safety Phrases | S26-S36-S37/39 |
| RIDADR | 3261 |
| WGK Germany | 3 |
| RTECS | GU1800000 |
| Packaging Group | II |
| Hazard Class | 8 |
| HS Code | 29144090 |
|
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Squaric acid CAS#:2892-51-5 |
| Literature: Cohen et al. Journal of the American Chemical Society, 1959 , vol. 81, p. 3480 Full Text View citing articles Show Details Park et al. Journal of the American Chemical Society, 1962 , vol. 84, p. 2919,2921 |
|
~%
Squaric acid CAS#:2892-51-5 |
| Literature: Paine, Anthony James Tetrahedron Letters, 1984 , vol. 25, # 2 p. 135 - 138 |
|
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Squaric acid CAS#:2892-51-5 |
| Literature: Islam, Nazar-ul; Sopher, David W.; Utley, James H. P. Tetrahedron, 1987 , vol. 43, # 5 p. 959 - 970 |
|
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Squaric acid CAS#:2892-51-5 |
| Literature: Bou; Pericas; Serratosa Tetrahedron Letters, 1982 , vol. 23, # 3 p. 361 - 364 |
|
~%
Squaric acid CAS#:2892-51-5 |
| Literature: Paine, Anthony James Tetrahedron Letters, 1984 , vol. 25, # 2 p. 135 - 138 |
| Precursor 5 | |
|---|---|
| DownStream 10 | |
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CAS#:33512-89-9| HS Code | 2914400090 |
|---|---|
| Summary | 2914400090 other ketone-alcohols and ketone-aldehydes。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:5.5%。General tariff:30.0% |
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A fluorescence high throughput screening method for the detection of reactive electrophiles as potential skin sensitizers.
Toxicol. Appl. Pharmacol. 289 , 177-84, (2015) Skin sensitization is an important toxicological end-point in the risk assessment of chemical allergens. Because of the complexity of the biological mechanisms associated with skin sensitization, inte... |
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Chiral squaramide derivatives are excellent hydrogen bond donor catalysts.
J. Am. Chem. Soc. 130(44) , 14416-7, (2008) Thioureas represent the dominant platform for hydrogen bond promoted asymmetric catalysts. A large number of reactions, reported in scores of publications, have been successfully promoted by chiral th... |
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Strategies for optimizing the performance of carbazole thiophene appended unsymmetrical squaraine dyes for dye-sensitized solar cells.
Phys. Chem. Chem. Phys. 17 , 23095-103, (2015) Unsymmetrical squaraine dyes (CTSQ-1 and CTSQ-2) with carbazole thiophene donor units were synthesized, characterized and used as sensitizers in dye-sensitized solar cells (DSSCs). These squaraines ex... |
| SQUARICACIDDIBUTYLESTERS |
| EINECS 220-761-4 |
| Squaric acid |
| dihydroxy-cyclobutenedion |
| Quadratic acid |
| 3,4-Dihydroxycyclobut-3-en-1,2-dion |
| 1-Cyclobutene-3,4-dione-1,2-diol |
| 3-Cyclobutene-1,2-dione, 3,4-dihydroxy- |
| 2-dione |
| 3,4-Dihydroxycyclobut-3-ene-1,2-dione |
| Squaric |
| DIKETOCYCLOBUTENEDIOL |
| dihydroxycyclobutenedione |
| MFCD00001334 |
| 3,4-Dihydroxy-3-cyclobutene-1,2-dione |
| SQUARC ACID |
- Shanghai Nianxing Industrial Co., Ltd
- China
- Product Name: Squaric acid
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- Shanghai Jizhi Biochemical Technology Co., Ltd
- China
- Product Name: Squaric acid
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- Dayang Chem (Hangzhou) Co., Ltd.
- China
- Product Name: Squaric acid
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- Henan Tianfu Chemical Co., Ltd.
- China
- Product Name: 2892-51-5 3,4-Dihydroxy-3-cyclobutene-1,2-dione
- Price: $Inquiry/1kg $Inquiry/25kg $Inquiry/1000kg $Inquiry/10ton
- Purity: 99.0%
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