5,5′-Dithiobis(2-nitrobenzoic acid)(CAS 69-78-3)
| Purity | Grade | Package | Stock | Price | Quantity |
| 98% | RG | 1G | In Stock | 4 USD
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| 98% | RG | 5G | In Stock | 12 USD
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| 98% | RG | 25G | In Stock | 51 USD
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| 98% | RG | 100G | In Stock | 115 USD
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| 98% | RG | 500G | In Stock | 820 USD
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| 99% | RG | 100G | In Stock | 138 USD
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Your region is eligible for ordering. Available NMR Spectrum
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Applications of 69-78-3
| Industry | Application | Process |
|---|---|---|
| Biochemistry and Molecular Biology | Quantitative determination of thiol (-SH) groups, for analysis of free cysteine residues in proteins and peptides | Ellman’s assay: DTNB reacts with thiols to generate yellow 5-thio-2-nitrobenzoic acid (TNB⁻), quantified by spectrophotometric measurement at 412 nm |
| Pharmaceutical R&D | As an enzyme activity inhibitor or probe to study the function and regulatory mechanisms of thiol-containing enzymes (e.g., protein tyrosine phosphatases, cathepsin B) | In vitro enzyme kinetic assays, using DTNB as a competitive or non-competitive inhibitor or as an active-site labeling reagent |
| Clinical Diagnostics | Detection of total thiols, reduced glutathione (GSH), and homocysteine in biological samples such as blood and urine | After appropriate dilution or deproteinization, samples are reacted with DTNB buffer and analyzed quantitatively by spectrophotometry |
| Food Science | Assessment of protein thiol oxidation extent and disulfide bond formation status during food processing (e.g., in dairy products and fermented meat products) | Thiols are extracted from homogenized samples using Tris-glycine buffer; free and total thiols are quantified via DTNB colorimetric assay |
| Cosmetic R&D | Monitoring stability of thiol-containing active ingredients (e.g., cysteine derivatives) and redox balance within formulations | During accelerated storage testing, thiol content is tracked periodically using the DTNB assay |
Physical and chemical properties of 69-78-3
Acidity coefficient |
1.57±0.25(Predicted) |
|---|---|
Boiling Point |
671.9±55.0 °C at 760 mmHg |
BRN |
1896821 |
Density |
1.8±0.1 g/cm3 |
Exact Mass |
395.972198 |
Flash Point |
360.1±31.5 °C |
Index of Refraction |
1.769 |
LogP |
3.97 |
Melting Point |
240-245 °C (dec.)(lit.) |
Merck |
14,3551 |
Molecular Formula |
C14H8N2O8S2 |
Molecular Weight |
396.352 |
PSA |
216.84000 |
Solubility |
Do you have solubility information on this product that you would like to share |
Stability |
Stable. Incompatible with strong bases, strong oxidizing agents. |
Storage condition |
Store at RT. |
Vapour Pressure |
0.0±2.2 mmHg at 25°C |
Water Solubility |
Soluble in water and ethanol. |
Spectrums of 69-78-3
1.The NMR spectrum displayed on the page is a pre-sale reference spectrum and may differ from that of the actual received batch.
2.The accompanying documentation will include the NMR spectrum and purity analysis data for the shipped batch.
Q&A for CAS 69-78-3
1. How can I verify product quality?
Every batch of our Chemical Reagents is tested to meet ISO 9001 standards. We provide COA & NMR & SDS Provided with each shipment. Batch COA available for verification, and third-party retesting is supported. A full refund is offered if our data is incorrect.
2. What is the delivery time?
Orders from Ready stock / In stock items typically Ships Tomorrow via Fast Shipping via FedEx/DHL/UPS. International deliveries usually arrive within 7 business days, subject to customs clearance.
3. What if the received product doesn’t meet quality standards?
If your Lab Grade Chemical Reagents do not match the Batch COA available, we will issue a replacement or a full refund upon verification.
4. Are hazardous labels included? How is safe shipping ensured?
Hazardous products are labeled and packaged following international regulations. We provide SDS Provided with all hazardous shipments to ensure safe and compliant transport.
5. Do you offer technical support?
Yes. Our Lab Supplier team is available to assist with questions about product usage, storage, Lab Grade requirements, applications, and more.
6. Are volume discounts available?
Yes. For bulk orders of Chemical Reagents, we offer competitive pricing. Submit a quotation request and we’ll provide a tailored offer.
7. Do you provide samples?
Yes, samples are available for selected Lab Grade products. Please submit a request to confirm availability and specifications.
8. Do you have products in stock?
Yes. Items labeled In stock / Ready stock on our website are available for immediate shipment, usually within 1–2 business days. Large packs or custom specifications require lead time confirmation.
9. Can you customize purity or packaging?
Yes. We support customization of Lab Grade purity, packaging size, and special testing requirements. Share your needs and we’ll provide a tailored solution.
10. Is the COA consistent with the shipped batch?
Yes. Batch COA available matches the actual shipment. COAs shown online are for reference or from previous batches.
11. Do you support long-term supply agreements?
Yes. We offer Lab Supplier services for stable batch consistency, pricing agreements, and safety stock for long-term customers to ensure uninterrupted supply.
12. What payment methods do you accept?
We accept Pay Local Currency via bank transfer (T/T), PayPal, and other methods. Credit terms are available for qualified long-term partners.
Download SDS of 69-78-3
Pictograms |
 |
|---|---|
Signal Word |
Warning |
Hazard Statements |
H315 Causes skin irritation H319 Causes serious eye irritation H335 May cause respiratory irritation |
Safety Data Sheet |
Download COA of 69-78-3
Operate under the ISO 9001 system
