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339792

Sigma-Aldrich

3,4-Dibutoxy-3-cyclobutene-1,2-dione

98%

Sinonimo/i:

Dibutyl squarate

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About This Item

Formula condensata:
[CH3(CH2)3O]2C4(=O)2
Numero CAS:
2892-62-8
Peso molecolare:
226.27
Numero MDL:
MFCD00037150
Codice UNSPSC:
12352100
ID PubChem:
24860681
NACRES:
NA.22

Livello qualitativo

200

Saggio

98%

Stato

liquid

Indice di rifrazione

n20/D 1.494 (lit.)

P. ebollizione

139 °C/0.5 mmHg (lit.)

Densità

1.047 g/mL at 25 °C (lit.)

Gruppo funzionale

ether
ketone

Stringa SMILE

CCCCOC1=C(OCCCC)C(=O)C1=O

InChI

1S/C12H18O4/c1-3-5-7-15-11-9(13)10(14)12(11)16-8-6-4-2/h3-8H2,1-2H3
XBRWELTXMQSEIN-UHFFFAOYSA-N

Categorie correlate

Descrizione generale

3,4-Dibutoxy-3-cyclobutene-1,2-dione is the dialkyl ester of squaric acid.

Applicazioni

3,4-Dibutoxy-3-cyclobutene-1,2-dione was used in the synthesis of novel semisquarylium dye, useful for highly selective Hg2+ sensing in aqueous media. It was also employed in the synthesis of 3-butoxy-4-(1,3,3-trimethyl-2,3-dihydro-1H-2-indolylidenemethyl)-3-cyclobutene-1,2-dione, intermediate for the synthesis of squaryl dyes.

Pittogrammi

Exclamation mark
GHS07

Avvertenze

Warning

Indicazioni di pericolo

H315,H317,H319,H335

Classi di pericolo

Eye Irrit. 2 - Skin Irrit. 2 - Skin Sens. 1 - STOT SE 3

Organi bersaglio

Respiratory system

Codice della classe di stoccaggio

10 - Combustible liquids

Classe di pericolosità dell'acqua (WGK)

WGK 3

Punto d’infiammabilità (°F)

235.4 °F - closed cup

Punto d’infiammabilità (°C)

113 °C - closed cup

Dispositivi di protezione individuale

Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter

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Certificati d'analisi (COA)

Lot/Batch Number
MKCV9981
MKCT1801
MKCQ1096
MKCK8731
MKCM1680

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Kazumasa Morita et al.
The Journal of dermatology, 29(10), 661-664 (2002-11-16)
Topical immunotherapy is effective for severe alopecia areata. However, there are patients with alopecia areata refractory to topical immunotherapy alone. We tried SADBE (squaric acid dibutylester) topical immunotherapy combined with topical dry ice cryotherapy, carpronium chloride (a parasympathetic nerve stimulant)
F Dall'oglio et al.
The Journal of dermatological treatment, 16(1), 10-14 (2005-05-18)
Severe alopecia areata (AA) may have a chronic relapsing course and is often resistant to current treatments. The aim of our study was to evaluate whether topical immunotherapy with squaric acid dibutylester (SADBE) is able to improve the course of
Aaron E Scott et al.
Toxicology and applied pharmacology, 183(1), 66-70 (2002-09-10)
The ability of chemical or pharmaceutical agents to induce allergic contact dermatitis (ACD) is of major health and regulatory concern. As such, tests to identify their sensitizing capacity, such as the guinea pig maximization test and the more recently developed
Eileen Tan et al.
International journal of dermatology, 41(11), 748-753 (2002-11-28)
Alopecia areata is believed to be an autoimmune condition with a worldwide occurrence. It usually presents as patchy, nonscarring hair loss. There is a paucity of clinical data in Asians. To study the epidemiology, clinical aspects, associations, and treatment of
C Ajith et al.
Journal of drugs in dermatology : JDD, 5(3), 262-266 (2006-04-01)
Immunotherapy with sqauric acid dibutyl ester (SADBE) is a well-accepted therapy for alopecia areata. To study efficacy, safety, and factors influencing the outcome in the treatment of alopecia areata. During a 4-year period, 70 patients of alopecia areata, unresponsive to
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