Hydrophobic Selection Guide

Methyl Silanes

Methyl Silanes: very hydrophobic, hydrolysates stable to 425 °C, acceptable performance to 600 °C reported, volatile

Methyl Silanes

Hydrolyzable Group	Products with 3 Hydrolyzable Groups	Products with 2 Hydrolyzable Groups	Products with 1 Hydrolyzable Group
Chloro	methyltrichlorosilane SIM6520.0	dimethyldichlorosilane SID4120.0	trimethylchlorosilane SIT8510.0
Methoxy	methyltrimethoxysilane SIM6560.0	dimethyldimethoxysilane SID4123.0	trimethylmethoxysilane SIT8566.0
Ethoxy	methyltriethoxysilane SIM6555.0	dimethyldiethoxysilane SID4121.0	trimethylethoxysilane SIT8515.0
Propoxy	methyltri-n-propoxysilane SIM6579.0		trimethyl-n-propoxysilane SIT8568.0
Methoxyalkoxy	methyltris(methoxyethoxy)silane SIM6585.0		methoxypropoxytrimethylsilane SIM6492.8
Acetoxy	methyltriacetoxysilane SIM6519.0	dimethyldiacetoxysilane SID4076.0	acetoxytrimethylsilane SIA0110.0
Dimethylamine	tris(dimethylamino)methylsilane SIT8712.0	bis(dimethylamino)dimethylsilane SIB1072.0	dimethylaminotrimethylsilane SID3605.0
Other Amine	tris(cyclohexylamino)methylsilane SIT8710.0	bis(diethylamino)dimethylsilane SIB1068.0	diethylaminotrimethylsilane SID3398.0
Silazane (NH)		hexamethylcyclotrisilazane SIH6102.0	hexamethyldisilazane SIH6110.0
Oxime	methyltris(methylethylketoximino)silane SIM6590.0

Methyl Silanes: very hydrophobic, hydrolysates stable to 425 °C, acceptable performance to 600 °C reported, volatile

Methyl-Siloxanyl Silanes

Description	Hydrolyzable Group	Products with 3+ Hydrolyzable Groups	Products with 2 Hydrolyzable Groups	Products with 1 Hydrolyzable Group
2 Si atom compounds	Chloro	trimethylsiloxytrichlorosilane SIT8572.6	dichlorotetramethyldisiloxane SID3372.0
2 Si atom compounds	Ethoxy	tetraethoxy-1,3-dimethyldisiloxane SIT7095.0	tetramethyldiethoxydisiloxane SIT7534.0
2 Si atom compounds	Acetoxy			pentamethylacetoxydisiloxane SIP6717.0
3 Si atom compounds	Chloro		dichlorohexamethyltrisiloxane SID3360.0 bis(trimethylsiloxy)dichlorosilane SIB1837.0
3 Si atom compounds	Methoxy			bis(trimethylsiloxy)methylmethoxysilane SIB1843.0
3 Si atom compounds	Ethoxy		1,5-diethoxyhexamethyltrisiloxane SID3394.0
Oligomeric polysiloxanes	Chloro		chlorine-terminated PDMS DMS-K05
Oligomeric polysiloxanes	Methoxy		methoxy-terminated PDMS DMS-XM11
Oligomeric polysiloxanes	Ethoxy		ethoxy-terminated PDMS DMS-XE11
Oligomeric polysiloxanes	Amine/Silazane		dimethylamine-terminated PDMS DMS-N05
Oligomeric polysiloxanes	Silanol		silanol-terminated PDMS DMS-S12
Oligomeric polysiloxanes	Selected Specialties	dimethyltetramethoxydisiloxane SID4236.0		dimethylethoxysilane SID4125.0 [tris(trimethylsiloxy)silylethyl]dimethylchlorosilane SIT8719.5

Linear Alkyl Silanes

Chain length	Description	Hydrolyzable Groups	Products with 3 Hydrolyzable Groups	Products with 2 Hydrolyzable Groups	Products with 1 Hydrolyzable Group
C2	hydrophobic, treatment for microporous mineral powders used as fillers for plastics	Chloro	ethyltrichlorosilane SIE4901.0	ethylmethyldichlorosilane SIE4896.0	ethyldimethylchlorosilane SIE4892.0
		Methoxy	ethyltrimethoxysilane SIE4901.4
		Ethoxy	ethyltriethoxysilane SIE4901.2
		Acetoxy	ethyltriacetoxysilane SIE4899.0
C3	hydrophobic, treatment for microporous mineral powders used as fillers for plastics	Chloro	propyltrichlorosilane SIP6915.0	propylmethyldichlorosilane SIP6912.0	propyldimethylchlorosilane SIP6910.0
		Methoxy	propyltrimethoxysilane SIP6918.0	propylmethyldimethoxysilane SIP6914.0	propyldimethylmethoxysilane SIP6911.0
		Ethoxy	propyltriethoxysilane SIP6917.0
		Amine/Silazane			dipropyltetramethyldisilazane SID4591.0
C4	moderate hydrophobicity, penetrates microporous structures, minimal organic compatibility	Chloro	n-butyltrichlorosilane SIB1982.0		n-butyldimethylchlorosilane SIB1934.0
		Methoxy	n-butyltrimethoxysilane SIB1988.0
		Ethoxy	n-butyltriethoxysilane SIB1986.0
		Amine/Silazane			n-butyldimethyl(dimethylamino)silane SIB1937.0
C5	moderate hydrophobicity with minimal organic compatibility	Chloro	pentyltrichlorosilane SIP6720.0
C5	moderate hydrophobicity with minimal organic compatibility	Ethoxy	pentyltriethoxysilane SIP6720.2
C6	moderate hydrophobicity with moderate organic compatibility	Chloro	hexyltrichlorosilane SIH6167.0	hexylmethyldichlorosilane SIH6165.6
		Methoxy	hexyltrimethoxysilane SIH6168.5
		Ethoxy	hexyltriethoxysilane SIH6167.5
C7	moderate hydrophobicity with moderate organic compatibility	Chloro	heptyltrichlorosilane SIH5846.0	heptylmethyldichlorosilane SIH5845.0
C8	hydrophobic with moderate organic compatibility - generally most economical	Chloro	octyltrichlorosilane SIO6713.0	octylmethyldichlorosilane SIO6712.0	octyldimethylchlorosilane SIO6711.0
		Methoxy	octyltrimethoxysilane SIO6715.5		octyldimethylmethoxysilane SIO6711.1
		Ethoxy	octyltriethoxysilane SIO6715.0	octylmethyldiethoxysilane SIO6712.2
		Amine			octyldimethyl(dimethylamino)silane SIO6711.3
		Silazane			dioctyltetramethyldisilazane SID4404.0
C10	hydrophobic, concentrates on surface of microporous structures	Chloro	decyltrichlorosilane SID2663.0	decylmethyldichlorosilane SID2662.0	decyldimethylchlorosilane SID2660.0
C10		Ethoxy	decyltriethoxysilane SID2665.0
C11	hydrophobic, concentrates on surface of microporous structures, forms SAMs	Chloro	undecyltrichlorosilane SIU9050.0
C12	hydrophobic, concentrates on surface of microporous structures, forms SAMs	Chloro	dodecyltrichlorosilane SID4630.0	dodecylmethyldichlorosilane SID4628.0	dodecyldimethylchlorosilane SID4627.0
C12		Ethoxy	dodecyltriethoxysilane SID4632.0	dodecylmethyldiethoxysilane SID4629.0
C14	hydrophobic, concentrates on surface of microporous structures, forms SAMs	Chloro	tetradecyltrichlorosilane SIT7093.0
C16	forms hydrophobic and oleophilic coatings, liquid a room temperature, forms SAMs	Chloro	hexadecyltrichlorosilane SIH5920.0
		Methoxy	hexadecyltrimethoxysilane SIH5925.0
		Ethoxy	hexadecyltriethoxysilane SIH5922.0
C18	forms hydrophobic and oleophilic coatings allowing full miscibility with parafinic materials, forms SAMs	Chloro	octadecyltrichlorosilane SIO6640.0	octadecylmethyldichlorosilane SIO6625.0	octadecyldimethylchlorosilane SIO6615.0
		Methoxy	octadecyltrimethoxysilane SIO6645.0	octadecylmethyldimethoxysilane SIO6629.0	octadecyldimethylmethoxysilane SIO6618.0
		Ethoxy	octadecyltriethoxysilane SIO6642.0	octadecylmethyldiethoxysilane SIO6627.0
		Amine			octadecyldimethyl(dimethylamino)silane SIO6617.0
		Proprietary	Siliclad® SIS6952.0 Glassclad® 18 PP1-GC18
C20	forms hydrophobic and oleophilic coatings, solid at room temperature	Chloro	eicosyltrichlorosilane SIE4661.0
C20-24	forms hydrophobic and oleophilic coatings, solid at room temperature	Chloro	docosyltrichlorosilane blend SID4621.0	docosylmethyldichlorosilane blend SID4620.0
C20-24		Ethoxy	docosyltriethoxysilane blend SID4622.09
C26-34	forms hydrophobic and oleophilic coatings, solid at room temperature	Chloro	triacontyltrichlorosilane blend SIT8048.0		triacontyldimethylchlorosilane blend SIT8045.0

Branched Alkyl Silanes

Branched and Cyclic Alkyl Silanes

Description	Hydrolyzable Groups	Products with 3 Hydrolyzable Groups	Products with 2 Hydrolyzable Groups	Products with 1 Hydrolyzable Group
C3	Chloro		isopropylmethyldichlorosilane SII6463.0	isopropyldimethylchlorosilane SII6462.0
C4	Chloro	isobutyltrichlorosilane SII6453.0 t-butyltrichlorosilane SIB1985.0	t-butylmethyldichlorosilane SIB1972.2	isobutyldimethylchlorosilane SII6452.5 t-butyldimethylchlorosilane SIB1935.0
C4	Methoxy	isobutyltrimethoxysilane SII6453.7	isobutylmethyldimethoxysilane SII6452.8
C4	Ethoxy	isobutyltriethoxysilane SII6453.5
C5	Chloro	cyclopentyltrichlorosilane SIC2555.0
C5	Methoxy	cyclopentyltrimethoxysilane SIC2557.0
C6	Chloro	(3,3-dimethylbutyl)trichlorosilane SID4069.0 t-hexyltrichlorosilane SIT7906.6 cyclohexyltrichlorosilane SIC2480.0	cyclohexylmethyldichlorosilane SIC2468.0	(3,3-dimethylbutyl)dimethylchlorosilane SID4065.0 t-hexyldimethylchlorosilane SIT7906.0 cyclohexyldimethylchlorosilane SIC2465.0
C6	Methoxy	cyclohexyltrimethoxysilane SIC2482.0	cyclohexylmethyldimethoxysilane SIC2469.0
C7 (norbornene)	Chloro	bicycloheptyltrichlorosilane SIB0997.0 (cyclohexylmethyl)trichlorosilane SIC2470.0		bicycloheptyldimethylchlorosilane SIB0994.0
C8	Chloro	isooctyltrichlorosilane SII6457.0 cyclooctyltrichlorosilane SIC2490.0		isooctyldimethylchlorosilane SII6456.6
C8	Methoxy	isooctyltrimethoxysilane SII6458.0
C8	Ethoxy	isooctyltriethoxysilane SII6453.5
C10				(dimethylchlorosilyl)methylpinane SID4074.0
C12	Chloro	adamantylethyltrichlorosilane SIA0325.0
C16	Chloro	7-(trichlorosilylmethyl)pentadecane SIT8162.4
C18 (silahydrocarbon)	Chloro	(di-n-octylmethylsilyl)ethyltrichlorosilane SID4401.5		(di-n-octylmethylsilyl)ethyldimethylchlorosilane SID4401.0
C24	Chloro			11-(chlorodimethylsilylmethyl)tricosane SIC2266.5
C28	Chloro	13-(trichlorosilylmethyl)heptacosane SIT8162.0		13-(chlorodimethylsilylmethyl)heptacosane SIC2266.0

Aromatic Silanes

Phenyl and Phenylalkyl Silanes

Spacer Atoms	Description	Hydrolyzable Group	Products with 3 Hydrolyzable Groups	Products with 2 Hydrolyzable Groups	Products with 1 Hydrolyzable Group
0	moderate hydrophobicity, hydrolysates stable to 325 °C; UV, radiation resistant	Chloro	phenyltrichlorosilane SIP6810.0	phenylmethyldichlorosilane SIP6738.0	phenyldimethylchlorosilane SIP6728.0
		Methoxy	phenyltrimethoxysilane SIP6822.0	phenylmethyldimethoxysilane SIP6740.0
		Ethoxy	phenyltriethoxysilane SIP6821.0	phenylmethyldiethoxysilane SIP6739.0	phenyldimethylethoxysilane SIP6728.4
		Acetoxy	phenyltriacetoxysilane SIP6790.0
		Oxime/Amine	phenyltris(methylethylketoximino)silane SIP6826.5	phenylmethylbis(dimethylamino)silane SIP6736.8
1		Chloro	benzyltrichlorosilane SIB0970.0 1-phenyl-1-trichlorosilylbutane SIP6813.0	1-phenyl-1-methyldichlorosilylbutane SIP6738.5	benzyldimethylchlorosilane SIB0962.0
1		Ethoxy	benzyltriethoxysilane SIB0971.0
2	more hydrophobic, acid resistant than phenyl	Chloro	phenethyltrichlorosilane SIP6722.0	phenethylmethyldichlorosilane SIP6721.5 (2-methyl-2-phenethyl) methydlichlorosilane SIM6512.5	phenethyldimethylchlorosilane SIP6721.0
		Methoxy	phenethyltrimethoxysilane SIP6722.6
		Amine/Silazane			phenethyldimethyl(dimethylamino)silane SIP6721.2
3		Chloro	(3-phenylpropyl)trichlorosilane SIP6744.6	(3-phenylpropyl)methyldichlorosilane SIP6744.0	(3-phenylpropyl)dimethylchlorosilane SIP6743.0
4		Chloro	4-phenylbutyltrichlorosilane SIP6724.9 phenoxypropyltrichlorosilane SIP6723.3	4-phenylbutylmethyldichlorosilane SIP6724.8 phenoxypropylmethyldichlorosilane SIP6723.25	4-phenylbutyldimethylchlorosilane SIP6724.7 phenoxypropyldimethylchlorosilane SIP6723.2
> 4		Chloro	phenoxyundecyltrichlorosilane SIP6736.4 phenylhexyltrichlorosilane SIP6723.4		(6-phenylhexyl)dimethylchlorosilane SIP6736.3

Substituted Phenyl and Phenylalkyl Silanes

Spacer Atoms	Description	Hydrolyzable Group	Products with 3 Hydrolyzable Groups	Products with 2 Hydrolyzable Groups	Products with 1 Hydrolyzable Group
0	more hydrophobic than phenyl, peroxide crosslinkable	Chloro	p-tolyltrichlorosilane SIT8040.0	p-tolylmethydichlorosilane SIT8035.0	p-tolyldimethylchlorosilane SIT8030.0
0	more hydrophobic than phenyl, peroxide crosslinkable	Methoxy	p-tolyltrimethoxysilane SIT8042.0
2	greater compatibility with styrenics, acrylics	Methyl/Chloro		(p-methylphenethyl)methyldichlorosilane SIM6511.0
		Ethyl/Methoxy	ethylphenethyltrimethoxysilane SIE4897.5
		t-Butyl/Chloro	p-(t-butyl)phenethyltrichlorosilane SIB1973.0		SIB1972.5 p-(t-butyl)phenethyldimethylchlorosilane SIT8030.0
3		Chloro	3-(p-methoxyphenyl)propyltrichlorosilane SIM6492.5	3-(p-methoxyphenyl)propylmethyldichlorosilane SIM6492.4

Napthyl Silanes: Form high refractive index coatings

Napthyl Silanes

Hydrolyzable Group	Products with 3 Hydrolyzable Groups	Products with 2 Hydrolyzable Groups	Products with 1 Hydrolyzable Group
Methoxy	1-napthyltrimethoxysilane SIN6597.0
Chloro	(1-napthylmethyl)trichlorosilane SIN6596.0

Napthyl Silanes: Form high refractive index coatings

Specialty Aromatic Silanes

Spacer Atoms	Hydrolyzable Group	Products with 3 Hydrolyzable Groups	Products with 2 Hydrolyzable Groups	Products with 1 Hydrolyzable Group
0	Chloro			m-phenoxyphenyldimethylchlorosilane SIP6723.0
4	Chloro			p-nonylphenoxypropyldimethylchlorosilane SIN6598.0

Fluorinated Alkyl Silanes

Fluorinated Linear Alkyl Silanes

Chain Length	Description	Hydrolyzable Groups	Products with 3 Hydrolyzable Groups	Products with 2 Hydrolyzable Groups	Products with 1 Hydrolyzable Group
C3	moderately polar hydrophobic coating	Chloro	(3,3,3-trifluoropropyl)trichlorosilane SIT8371.0	(3,3,3-trifluoropropyl)methyldichlorosilane SIT8369.0	(3,3,3-trifluoropropyl)dimethylchlorosilane SIT8364.0
		Methoxy	(3,3,3-trifluoropropyl)trimethoxysilane SIT8372.0	(3,3,3-trifluoropropyl)methyldimethoxysilane SIT8370.0
		Amine/Silazane			bis(trifluoropropyl)tetramethyldisilazane SIB1828.4
C6	hydrophobic films	Chloro	nonafluorohexyltrichlorosilane SIN6597.6	nonafluorohexylmethyldichlorosilane SIN6597.5	nonafluorohexyldimethylchlorosilane SIN6597.3
		Methoxy	nonafluorohexyltrimethoxysilane SIN6597.7
		Ethoxy	nonafluorohexyltriethoxysilane SIN6597.65
		Amine/Silazane	nonafluorohexyltris(dimethylamino)silane SIN6597.4		nonafluorohexyldimethyl(dimethylamino)silane SIN6597.4
C8	hydrophobic, oleophobic films	Chloro	(tridecafluoro-1,1,2,2-tetrahydrooctyl)trichlorosilane SIT8174.0	(tridecafluoro-1,1,2,2-tetrahydrooctyl)methyldichlorosilane SIT8172.0	(tridecafluoro-1,1,2,2-tetrahydrooctyl)dimethylchlorosilane SIT8170.0
		Methoxy	(tridecafluoro-1,1,2,2-tetrahydrooctyl)trimethoxysilane SIT8176.0
		Ethoxy	(tridecafluoro-1,1,2,2-tetrahydrooctyl)triethoxysilane SIT8175.0
C10	forms oleophobic films with extremely low surface energy	Chloro	(heptadecafluoro-1,1,2,2-tetrahydrodecyl)trichlorosilane SIH5841.0	(heptadecafluoro-1,1,2,2-tetrahydrodecyl)methyldichlorosilane SH5840.6	(heptadecafluoro-1,1,2,2-tetrahydrodecyl)dimethylchlorosilane SIH5840.4
		Methoxy	(heptadecafluoro-1,1,2,2-tetrahydrodecyl)trimethoxysilane SIH5841.5
		Ethoxy	(heptadecafluoro-1,1,2,2-tetrahydrodecyl)triethoxysilane SIH5841.2
C12		Chloro	heneicocyl-1,1,2,2-tetrahydrodecyltrichlorosilane SIH5840.25

Fluorinated Branched Alkyl Silanes

Fluorinated Carbons	Hydrolyzable Group	Products with 3 Hydrolyzable Groups	Products with 1 Hydrolyzable Group
1 x 3	Chloro Methoxy	heptafluoroisopropoxytrichlorosilane SIH5842.0 heptafluoroisopropoxytrimethoxysilane SIH5842.2
2 x 4	Chloro		bis(nonafluorohexyldimethylsiloxy)methylsilylethyldimethylchlorosilane SIB1706.0
2 x 6	Chloro	tridecafluoro-2-(tridecafluorohexyl)decyltrichlorosilane SIT8176.3

Dialkyl Silanes

Highest Carbon #	Next Carbon #	Hydrolyzable Group	Products with 2 Hydrolyzable Groups
C2	C2	Chloro	diethyldichlorosilane SID3402.0
C2	C2	Ethoxy	diethyldiethoxysilane SID3404.0
C3	C3	Chloro	diisopropyldichlorosilane SID3537.0
C3	C3	Methoxy	diisopropyldimethoxysilane SID3538.0
C4	C4	Chloro	di-n-butyldichlorosilane SID3203.0
C4	C4	Methoxy	di-n-butyldimethoxysilane SID3214.0 diisobutyldimethoxysilane SID3530.0
C4	C4	Ethoxy	diisobutyldiethoxysilane SID3528.0
C4	C3	Methoxy	isobutylisopropyldimethoxysilane SII6452.6
C5	C5	Chloro	dicyclopentyldichlorosilane SID3390.0
C5	C5	Methoxy	dicyclopentyldimethoxysilane SID3391.0
C6	C6	Chloro	di-n-hexyldichlorosilane SID3510.0 dicyclohexyldichlorosilane SID3382.0
C8	C8	Chloro	di-n-octyldichlorosilane SID4400.0
C8	C8	Methoxy	di-n-octyldimethoxysilane SID4400.4

Hydrophobicity, Hydrophilicity, and Silane Surface Modification

Hydrophobic Selection Guide

Methyl Silanes

Methyl Silanes

Methyl-Siloxanyl Silanes

Linear Alkyl Silanes

Linear Alkyl Silanes

Branched Alkyl Silanes

Branched and Cyclic Alkyl Silanes

Aromatic Silanes

Phenyl and Phenylalkyl Silanes

Substituted Phenyl and Phenylalkyl Silanes

Napthyl Silanes

Specialty Aromatic Silanes

Fluorinated Alkyl Silanes

Fluorinated Linear Alkyl Silanes

Fluorinated Branched Alkyl Silanes

Dialkyl Silanes

Dialkyl Silanes