If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/418/501/product-dating-information-06-25-mk.pdf
545996
Seleno-L-cystine
95%, for peptide synthesis
Synonym(s):
(R,R)-3,3′-Diseleno-bis(2-aminopropionic acid), L-Selenocystine
Select a Size
| Size/SKU | Availability | Price |
|---|---|---|
250 mg | Available to ship TODAYfromMILWAUKEE | $185.00 |
1 g | Available to ship TODAYfromMILWAUKEE | $315.00 |
About This Item
Product Name
Seleno-L-cystine, 95%
Quality Segment
assay
95%
form
powder or crystals
optical activity
[α]20/D −28°, c = 1 in NaOH
reaction suitability
reaction type: solution phase peptide synthesis
mp
224.5-229.5 °C (lit.)
application(s)
peptide synthesis
storage temp.
2-8°C
SMILES string
N[C@@H](C[Se][Se]C[C@H](N)C(O)=O)C(O)=O
InChI
1S/C6H12N2O4Se2/c7-3(5(9)10)1-13-14-2-4(8)6(11)12/h3-4H,1-2,7-8H2,(H,9,10)(H,11,12)/t3-,4-/m0/s1
InChI key
JULROCUWKLNBSN-IMJSIDKUSA-N
Application
- Biologically active selenol compounds.
- Non-natural selenylated diamino acids.
1 of 1
This Item | |||
|---|---|---|---|
| description 95% | description ≥98% (TLC), crystalline | description ≥99.7% (TLC) | description Wacker Chemie AG, ≥98.5% |
| form powder or crystals | form crystalline | form powder or crystals | form powder |
| assay 95% | assay ≥98% (TLC) | assay ≥99.7% (TLC) | assay ≥98.5% |
| storage temp. 2-8°C | storage temp. room temp | storage temp. - | storage temp. - |
| Quality Level 100 | Quality Level 200 | Quality Level 200 | Quality Level 200 |
| mp 224.5-229.5 °C (lit.) | mp >240 °C (dec.) (lit.) | mp >240 °C (dec.) (lit.) | mp >240 °C (dec.) (lit.) |
| optical activity [α]20/D −28°, c = 1 in NaOH | optical activity - | optical activity [α]20/D −219±5°, c = 1% in 1 M HCl | optical activity [α]/D -224 to -218° |
Signal Word
Danger
Hazard Codes
Precautionary Statements
Hazard Classifications
Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - STOT RE 2
Storage Class
6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects
WGK
WGK 3
Flash Point (°F)
Not applicable
Flash Point (°C)
Not applicable
PPE (personal protective equipment)
Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges
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How can I determine the shelf life / expiration / retest date of this product?
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How is shipping temperature determined? And how is it related to the product storage temperature?
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Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf
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