2,6-Xylenol

2,6-Xylenol^[1]
Names
	Preferred IUPAC name 2,6-Dimethylphenol
	Other names 2-Hydroxy-m-xylene
Identifiers
CAS Number	576-26-1 ;
3D model (JSmol)	Interactive image;
ChemSpider	13839174 ;
ECHA InfoCard	100.008.547
PubChem CID	11335;
UNII	I8N0RO87OV ;
CompTox Dashboard (EPA)	DTXSID2049711 DTXSID9024063, DTXSID2049711 ;
	InChI InChI=1S/C8H10O/c1-6-4-3-5-7(2)8(6)9/h3-5,9H,1-2H3 Key: NXXYKOUNUYWIHA-UHFFFAOYSA-N ; InChI=1/C8H10O/c1-6-4-3-5-7(2)8(6)9/h3-5,9H,1-2H3 Key: NXXYKOUNUYWIHA-UHFFFAOYAM;
	SMILES CC1=C(C(=CC=C1)C)O;
Properties
Chemical formula	C8H10O
Molar mass	122.167 g·mol−1
Appearance	white solid
Density	1.132 g/cm3
Melting point	43 to 45 °C (109 to 113 °F; 316 to 318 K)
Boiling point	203 °C (397 °F; 476 K)
Hazards
Flash point	86 °C (187 °F; 359 K)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

2,6-Xylenol is a chemical compound which is one of the six isomers of xylenol. It is also commonly known as 2,6-dimethylphenol (DMP). It is a colorless solid.

Production

2,6-DMP is produced by the methylation of phenol. With production >100,000 tons/y, it is the most important xylenol. The methylation is carried out by contacting gaseous phenol and methanol at elevated temperatures in the presence of a solid acid catalyst:^[2]^[3]

C₆H₅OH + 2 CH₃OH → (CH₃)₂C₆H₃OH + 2 H₂O

Challenges associated with the production is the similarity of the boiling points of cresols and this xylenol.

Reactions

2,6-Xylenol is susceptible to oxidative coupling leading to polymers and dimers.^[4]

Acid-catalyzed condensation of 2,6-xylenol gives tetramethylbisphenol A. An analogue of bisphenol A, this bisphenol is used in the production of some polycarbonates. 2,6-Xylenol reacts with ammonia to give 2,6-dimethylaniline.^[2]

Toxicity

Its LD50 (oral, rats) ranges from 296-1750 mg/kg.^[2]

References

^ 2,6-Xylenol at Sigma-Aldrich
^ ^a ^b ^c Fiege, Helmut (2000). "Cresols and Xylenols". Ullmann's Encyclopedia of Industrial Chemistry. doi:10.1002/14356007.a08_025. ISBN 3527306730.
^ Zukowski, W.; Berkowicz, G.; Baron, J.; Kandefer, S.; Jamanek, D.; Szarlik, S.; Wielgosz, Z.; Zielecka, M. (2014). "Selective phenol methylation to 2,6-dimethylphenol in a fluidized bed of iron-chromium mixed oxide catalyst with o-cresol circulation" (PDF). Chemistry Central Journal. 8 (1): 51. doi:10.1186/s13065-014-0051-6. PMC 4172955. PMID 25342964.
^ Selective oxidative para C–C dimerization of 2,6-dimethylphenol Christophe Boldron, Guillem Aromí, Ger Challa, Patrick Gamez and Jan Reedijk Chemical Communications, 2005, (46), 5808 - 5810 Abstract

[1] 2,6-Xylenol at Sigma-Aldrich

[Ullmann-2] Fiege, Helmut (2000). "Cresols and Xylenols". Ullmann's Encyclopedia of Industrial Chemistry. doi:10.1002/14356007.a08_025. ISBN 3527306730.

[3] Zukowski, W.; Berkowicz, G.; Baron, J.; Kandefer, S.; Jamanek, D.; Szarlik, S.; Wielgosz, Z.; Zielecka, M. (2014). "Selective phenol methylation to 2,6-dimethylphenol in a fluidized bed of iron-chromium mixed oxide catalyst with o-cresol circulation" (PDF). Chemistry Central Journal. 8 (1): 51. doi:10.1186/s13065-014-0051-6. PMC 4172955. PMID 25342964.

[4] Selective oxidative para C–C dimerization of 2,6-dimethylphenol Christophe Boldron, Guillem Aromí, Ger Challa, Patrick Gamez and Jan Reedijk Chemical Communications, 2005, (46), 5808 - 5810 Abstract

[1]

[2]

[3]

[4]