D5545

DL-Dithiothreitol

BioXtra, ≥99.0% (titration)

• Synonym(s): threo-1,4-Dimercapto-2,3-butanediol, Cleland’s reagent, DTT
• Linear Formula: HSCH₂CH(OH)CH(OH)CH₂SH
• CAS Number: 3483-12-3
• Molecular Weight: 154.25
• Beilstein/REAXYS Number: 1719757
• EC Number: 222-468-7
• MDL number: MFCD00004877
• UNSPSC Code: 12352201
• PubChem Substance ID: 24893941
• NACRES: NA.21

Properties

• product line: BioXtra
• Quality Level: 200
• assay: ≥99.0% (titration)
• form: powder
• reaction suitability: reagent type: reductant
• impurities: Insoluble matter, passes filter test; ≤0.3% 4,5-dihydroxy-1,2-dithiane
• pH: 4.0-6.0 (20-25 °C, 0.1 m in H₂O)
• mp: 41-44 °C (lit.)
• solubility: H₂O: 0.1 M, clear, colorless
• anion traces: sulfate (SO₄^2-): ≤0.005%
• cation traces: Al: ≤0.0005%; As: ≤0.0001%; Ba: ≤0.0005%; Bi: ≤0.0005%; Ca: ≤0.001%; Cd: ≤0.0005%; Co: ≤0.0005%; Cr: ≤0.0005%; Cu: ≤0.0005%; Fe: ≤0.0005%; K: ≤0.005%; Li: ≤0.0005%; Mg: ≤0.0005%; Mn: ≤0.0005%; Mo: ≤0.0005%; Na: ≤0.1%; Ni: ≤0.0005%; Pb: ≤0.0005%; Sr: ≤0.0005%; Zn: ≤0.0005%
• absorption: ≤0.100 at 280 in H₂O at 0.1 M; ≤0.400 at 260 in H₂O at 0.1 M
• storage temp.: 2-8°C
• SMILES string: O[C@H](CS)[C@H](O)CS
• InChI: 1S/C4H10O2S2/c5-3(1-7)4(6)2-8/h3-8H,1-2H2/t3-,4-/m1/s1
• InChI key: VHJLVAABSRFDPM-QWWZWVQMSA-N

Description

Application

An excellent reagent for maintaining SH groups in reduced state; quantitatively reduces disulfides. DTT is effective in sample buffers for reducing protein disulfide bonds prior to SDS-PAGE. DTT can also be used for reducing the disulfide bridge of the cross-linker N,N′-bis(acryloyl)cystamine to break apart the matrix of a polyacrylamide gel. DTT is less pungent and is less toxic than 2-mercaptoethanol. Typically, a seven fold lower concentration of DTT (100 mM) is needed than is used for 2-mercaptoethanol (5% v/v, 700 mM).

Safety Information

• pictograms: GHS05,GHS07
• signalword: Danger
• hcodes: H302,H315,H318
• pcodes: P264 - P280 - P301 + P312 - P302 + P352 - P305 + P351 + P338 - P332 + P313
• Hazard Classifications: Acute Tox. 4 Oral - Eye Dam. 1 - Skin Irrit. 2
• Storage Class: 11 - Combustible Solids
• wgk_germany: WGK 2
• flash_point_f: Not applicable
• flash_point_c: Not applicable
• ppe: dust mask type N95 (US), Eyeshields, Faceshields, Gloves