- Shanghai Jizhi Biochemical Technology Co., Ltd
- China
- Product Name: Squaric acid
- Price: ￥348.0/25g ￥118.0/5g
- Purity: 98.0%
- Stocking Period: 3 Day
- Contact: Liu jia
- Dayang Chem (Hangzhou) Co., Ltd.
- China
- Product Name: Squaric acid
- Price: $Inquiry/100g $Inquiry/1kg $Inquiry/100kg $Inquiry/1000kg
- Purity: 98.0%
- Stocking Period: Inquiry
- Contact: Ms Wang
- Zhejiang Hangyu API Co., Ltd
- China
- Product Name: Squaric acid
- Price: ￥Inquiry/1kg
- Purity: 99.5%
- Stocking Period: Inquiry
- Contact: Vinnie
- 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%
- Stocking Period: Inquiry
- Contact: Anson
2892-51-5
2892-51-5 structure
- Name: Squaric acid
- Chemical Name: squaric acid
- CAS Number: 2892-51-5
- Molecular Formula: C4H2O4
- Molecular Weight: 114.056
- Catalog: Chemical reagent Organic reagent Fatty ketone (including enol)
- Create Date: 2018-02-05 08:00:00
- Modify Date: 2024-01-01 21:43:02
| Name | squaric acid |
|---|---|
| Synonyms |
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 |
| 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 |
|
~%
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 |
|
~%
2892-51-5 |
| Literature: Paine, Anthony James Tetrahedron Letters, 1984 , vol. 25, # 2 p. 135 - 138 |
|
~%
2892-51-5 |
| Literature: Islam, Nazar-ul; Sopher, David W.; Utley, James H. P. Tetrahedron, 1987 , vol. 43, # 5 p. 959 - 970 |
|
~%
2892-51-5 |
| Literature: Bou; Pericas; Serratosa Tetrahedron Letters, 1982 , vol. 23, # 3 p. 361 - 364 |
|
~%
2892-51-5 |
| Literature: Paine, Anthony James Tetrahedron Letters, 1984 , vol. 25, # 2 p. 135 - 138 |
| Precursor 5 | |
|---|---|
| DownStream 10 | |
![(4Z)-3-oxo-4-[(1,3,3-trimethylindol-1-ium-2-yl)methylidene]-2-[(E)-(1,3,3-trimethylindol-2-ylidene)methyl]cyclobuten-1-olate structure](https://www.chemsrc.com/caspic/366/14238-53-0.png)
![Quinolinium,1-ethyl-2-[[3-[(1-ethyl-2(1H)-quinolinylidene)methyl]-2-hydroxy-4-oxo-2-cyclobuten-1-ylidene]methyl]-,inner salt structure](https://www.chemsrc.com/caspic/219/23475-74-3.png)
| 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% |