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Silylation reagents - BSTFA, SILYL-991

Macherey-Nagel GmbH & Co. KG (15134)

Silylation reagents - BSTFA, SILYL-991
For improved volatility, better thermal stability or low limit of detection in gas chromatography prerequisite: quantitative, rapid and reproducible formation of only on derivative halogen atoms introduced by derivatisation (e.g. trifluoroacetates) allow specific detection (ECD) with the advantage of high sensitivity elution order and fragmentation patterns in MS can be influenced by a specific derivatisation.
Reagents for silylation - alkylation (methylation) - acylation are available.
N,O-bis-trimethylsilyl-trifluoroacetamide
m.w. 257.4, Bp 40°C (12mm Hg), density d20°/4° = 0.961
BSTFA: R = CF3 powerful trimethylsilyl donor with approximately the same donor strength as the non-fluorinated analogue BSA
advantage of BSTFA over BSA: greater volatility of its reaction products (particularly useful for GC of some lower boiling TMS amino acids.

BSTFA is nonpolar (less polar than MSTFA), and can be mixed with acetonitrile for improved solubility. For silylating fatty acid amides, hindered hydroxyls and other compounds, which are difficult to silylate (like secondary alcohols and amines), we recommend BSTFA + 1% trimethylchlorosilane (TMCS), available under the designation SILYL-991.

PN	Manuf. PN	Supplier	Capacity~ml	Description	PK	General	Price
4001486	701220.201	Macherey-Nagel GmbH & Co. KG	1	BSTFA	20	Dangerous substance	Inquire
4001487	701220.510	Macherey-Nagel GmbH & Co. KG	10	BSTFA	5	Dangerous substance	Inquire
4001509	701490.1100	Macherey-Nagel GmbH & Co. KG	100	SILYL-991 (BSTFA - TMCS (99:1)	1	Dangerous substance	Inquire
4001510	701490.150	Macherey-Nagel GmbH & Co. KG	50	SILYL-991 (BSTFA - TMCS (99:1)	1	Dangerous substance	Inquire
4001511	701490.201	Macherey-Nagel GmbH & Co. KG	1	SILYL-991 (BSTFA - TMCS (99:1)	20	Dangerous substance	Inquire
6803320	701220.110	Macherey-Nagel GmbH & Co. KG	10	BSTFA	1	Dangerous substance	Inquire

Silylation reagents - MSTFA

Macherey-Nagel GmbH & Co. KG (15135)

Silylation reagents - MSTFA
For improved volatility, better thermal stability or low limit of detection in gas chromatography prerequisite: quantitative, rapid and reproducible formation of only on derivative halogen atoms introduced by derivatisation (e.g. trifluoroacetates) allow specific detection (ECD) with the advantage of high sensitivity elution order and fragmentation patterns in MS can be influenced by a specific derivatisation.
Reagents for silylation - alkylation (methylation) - acylation are available.
N-methyl-N-trimethylsilyl-trifluoroacetamide
m.w. 199.1, Bp 70 °C (75 mm Hg), density d20°/4° = 1.11
MSTFA: R' = CF3, R" = CH3
The most volatile trimethylsilyl amide available.
Very strong TMS donor which does not cause any noticeable fouling of the FID burning chamber even after long-time measuring series.
The already good solution characteristics can be improved by addition of submolar quantities of protic solvents (e.g. TFA for extremely polar compounds such as hydrochlorides) or pyridine (e.g. for carbohydrates).

PN	Manuf. PN	Supplier	Capacity~ml	Description	PK	General	Price
6085475	701270.510	Macherey-Nagel GmbH & Co. KG	10	MSTFA	5	Dangerous substance	Inquire
6227450	701270.650	Macherey-Nagel GmbH & Co. KG	50	MSTFA	6	Dangerous substance	Inquire
6227683	701270.1100	Macherey-Nagel GmbH & Co. KG	100	MSTFA	1	Dangerous substance	Inquire
6704091	701270.110	Macherey-Nagel GmbH & Co. KG	10	MSTFA	1	Dangerous substance	Inquire
4001492	701270.12100	Macherey-Nagel GmbH & Co. KG	100	MSTFA	12		11558.82 EU
4001493	701270.6100	Macherey-Nagel GmbH & Co. KG	100	MSTFA	6		5963.24 EU
7055892	701270.201	Macherey-Nagel GmbH & Co. KG	1	MSTFA	20		352.94 EU

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