(Fmoc-L-Cys-OtBu)2 - ≥97% , CAS No.139592-37-3

CAS: 139592-37-3 Cat. No.: F350822 Molecular Weight: 796.99
AVAILABLE TO ORDER
GRADE & PURITY ≥97%
Synonyms
Nα,Nα-Bis-Fmoc-L-cystine bis(tert-butyl ester) | (Fmoc-cys-otbu)2 (disulfide bond) | Bis(2-Methyl-2-Propanyl) N,N'-Bis[(9H-Fluoren-9-Ylmethoxy)Carbonyl]-L-Cystinate | tert-butyl (2R)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-3-[[(2R)-2-(9H-fluoren-9-ylmetho
Storage
Store at -20°C
Shipped In
Ice chest + Ice pads
 ·  off list, applied to all prices below.
Size
Status
Price
Qty
250mg
F350822-250mg
4

$9.90

$14.90
Save $5.00 (33.56%)
1g
F350822-1g
4

$10.90

$16.90
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5g
F350822-5g
4

$39.90

$59.90
Save $20.00 (33.39%)
25g
F350822-25g
4

$111.90

$167.90
Save $56.00 (33.35%)
100g
F350822-100g
2

$446.90

$670.90
Save $224.00 (33.39%)
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Why this grade

≥97% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

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Storage & shipping

Store at -20°C Ships Ice chest + Ice pads Check lot-specific COA for exact specifications.

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Quality documents

SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.

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Literature proof

Cited in 0 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Overview

(Fmoc-L-Cys-OtBu)2, (Disulfide bond) is an Fmoc protected cysteine derivative potentially useful for proteomics studies, and solid phase peptide synthesis techniques. Cysteine is versatile amino acid involved with many biological processes, including the formation of disulfide bonds - a critical component of protein structure. This compound could be useful as an unusual amino acid analog to aid in the deconvolution of protein structure and function.

Specifications

Synonyms
Nα, Nα-Bis-Fmoc-L-cystine bis(tert-butyl ester) | (Fmoc-cys-otbu)2 (disulfide bond) | Bis(2-Methyl-2-Propanyl) N, N'-Bis[(9H-Fluoren-9-Ylmethoxy)Carbonyl]-L-Cystinate | tert-butyl (2R)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-3-[[(2R)-2-(9H-fluoren-9-ylmetho
Specifications & Purity
≥97%
Storage
Store at -20°C
Shipped In
Ice chest + Ice pads
This product requires cold chain shipping. Ground and other economy services are not available.
Purity
≥97%
Names and Identifiers
Pubchem Sid488202362
Pubchem Sid Urlhttps://pubchem.ncbi.nlm.nih.gov/substance/488202362
Canonical SmilesCC(C)(C)OC(=O)C(CSSCC(C(=O)OC(C)(C)C)NC(=O)OCC1C2=CC=CC=C2C3=CC=CC=C13)NC(=O)OCC4C5=CC=CC=C5C6=CC=CC=C46
IUPAC Nametert-butyl (2R)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-3-[[(2R)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-3-[(2-methylpropan-2-yl)oxy]-3-oxopropyl]disulfanyl]propanoate
InChIKeyIQCNHOFZFYLKLF-UWXQCODUSA-N
INCHI1S/C44H48N2O8S2/c1-43(2,3)53-39(47)37(45-41(49)51-23-35-31-19-11-7-15-27(31)28-16-8-12-20-32(28)35)25-55-56-26-38(40(48)54-44(4,5)6)46-42(50)52-24-36-33-21-13-9-17-29(33)30-18-10-14-22-34(30)36/h7-22,35-38H,23-26H2,1-6H3,(H,45,49)(H,46,50)/t37-,38-/m0/s1
Isomeric SMILES CC(C)(C)OC(=O)[C@H](CSSC[C@@H](C(=O)OC(C)(C)C)NC(=O)OCC1C2=CC=CC=C2C3=CC=CC=C13)NC(=O)OCC4C5=CC=CC=C5C6=CC=CC=C46
Molecular Weight 796.99
Reaxy-Rn 32239333
Reaxys-RN_link_address https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=32239333&ln=

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

Download SDS →

✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

Look up COA →

📊 Datasheet

Quick-reference summary of product specifications and applications.

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🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

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Advanced Data

3D Structure
Interactive Chemical Structure Model





Certificates(CoA,COO,BSE/TSE and Analysis Chart)
C of A & Other Certificates(BSE/TSE, COO):
Analytical Chart:

Find and download the COA for your product by matching the lot number on the packaging.

12 results found

Lot NumberCertificate TypeDateItem
C23151781Certificate of AnalysisJan 07, 2026 F350822
C23151780Certificate of AnalysisJan 07, 2026 F350822
C23151726Certificate of AnalysisJan 07, 2026 F350822
C23151725Certificate of AnalysisJan 07, 2026 F350822
C23151637Certificate of AnalysisJan 07, 2026 F350822
C23151627Certificate of AnalysisJan 07, 2026 F350822
C23151616Certificate of AnalysisDec 10, 2025 F350822
C23151626Certificate of AnalysisDec 10, 2025 F350822
C23151633Certificate of AnalysisDec 10, 2025 F350822
C23151636Certificate of AnalysisDec 10, 2025 F350822
C2520294Certificate of AnalysisDec 03, 2022 F350822
I2406038Certificate of AnalysisDec 03, 2022 F350822

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Chemical and Physical Properties
Refractive Indexn20D1.61 (Predicted)
Boil Point(°C)~905.0° C at 760 mmHg (Predicted)
Molecular Weight797.000 g/mol
XLogP38.500
Hydrogen Bond Donor Count2
Hydrogen Bond Acceptor Count10
Rotatable Bond Count19
Exact Mass796.285 Da
Monoisotopic Mass796.285 Da
Topological Polar Surface Area180.000 Ų
Heavy Atom Count56
Formal Charge0
Complexity1210.000
Isotope Atom Count0
Defined Atom Stereocenter Count2
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count1
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