4-tert-Butylcalix[4]arene manufacturers and suppliers

4-tert-Butylcalix[4]arene suppliers

Properties

Melting point:: ≥300 °C(lit.)

Boiling point:: 636.8°C (rough estimate)

Density: 0.9543 (rough estimate)

refractive index: 1.6400 (estimate)

storage temp.: Store below +30°C.

pka: 9.53±0.20(Predicted)

form: Crystalline Powder or Flakes

color: White to light beige

Water Solubility: Soluble in chloroform, benzene, toluene. Insoluble in water.

BRN: 2033965

InChIKey: NVKLTRSBZLYZHK-UHFFFAOYSA-N

Safety Information

Symbol(GHS): GHS07

Signal word: Warning

Hazard statements: H335-H315-H319

Precautionary statements: P264-P280-P302+P352+P332+P313+P362+P364-P305+P351+P338+P337+P313-P261-P280a-P304+P340-P305+P351+P338-P405-P501a

Risk Statements: 36/37/38

Safety Statements: 22-24/25

WGK Germany: 3

HS Code: 29072990

Use

The calixarene recrystallises from CHCl3 in large solvated prisms (m 380o dec); it effloresces on drying in air. Its tetra-acetate crystallises from Ac2O in colourless prisms m 332-333o(dec). It crystallises from CCl4 or chlorobenzene /EtOH (m >300o) and the tetra-acetate crystallises from CHCl3/EtOH m >290o(dec). It also crystallises from toluene in white plates with toluene of crystallisation m 344-346o (330-332o); the tetra-acetate crystallises with 1AcOH of crystallisation m 383-386o (softening at 330-340o, also m 283-286o), but acetylation with Ac2O/NaOAc gives the triacetate which recrystallises from AcOH with 1AcOH of crystallisation m 278-281o. 4-tert-Butylcalix[4]arene (100mg) is unchanged after boiling for 4hours with 10N KOH (0.04mL) in xylene (4mL). [Br J Pharmacol 10 73 1955, K.mmerer et al. Monatsh Chem 109 767 1978, Gutsche et al. J Am Chem Soc 103 3782 1981; see also Kluawer in Calixarenes, Vicens & B.hner eds Academic Press 1991, Beilstein 6 IV 7858.]

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