Good chemistry, great solutions.
Marques da Silva & Neves, Lda.
Comprehensive service
25 Years Of Undefeated Success
We open and close the circle, putting at your disposal a wide catalog of products, custom formulations, advanced logistics system and final waste management.
512+
Successfully Project Finished.
25+
Years of experience with proud
1120+
Revenue in 2017 investment
1520+
Colleagues & counting more daily
99% Successful Delivery Rate | No Hidden Fees | Secure Transactions
Product Categories
Bioactive Chemicals
.
Research Peptides & Amino Acids
Natural Products
Isotope Labeled Compounds
Reference Standards
Catalysts and Ligands
Sustainability
Fueling Innovation, One Molecule at a Time
We Follow Best Practices
At Marquess we are clear, our client is the center of our service. For this reason, we constantly and evolutionarily work on our service portfolio, always thinking of the client as the center of all our activity.
- Sustainablility
- Project On Time
- Modern Technology
- Latest Designs
Specialty chemistry and hard-to-find molecules
Whether you are in search of building blocks, screening compounds, custom chemistry services, compound data or antibodies, we take the guesswork out of purchasing molecules for drug discovery research.
Search and buy commonly-used and niche, advanced molecules from around the globe with a few clicks. We manage and track your order to ensure it arrives on time so you can focus on your research.
Commitment to Precision
99%+ Research-Grade Purity
Our chemicals are rigorously tested to ensure the highest purity standards for your research.
Third-Party Lab Tested
All products undergo independent testing to ensure quality and reliability.
Discreet Worldwide Shipping
Fast, secure, and discreet shipping to ensure your research materials arrive safely.
99%+ Research-Grade Purity
Fueling Innovation, One Molecule at a Time
High-Quality Research Chemicals for Advanced Scientific Studies
marquessilvaneves.com
10% off for new clients
Leading Supplier of Laboratory Chemicals
AFFORDABLY
RELIABLY
FAST Supply
Discrete
What Our Clients Say
MDPHP Freebase
Alice Howard
Great selection of research chemicals. The only reason I’m not giving five stars is that I wish they had a wider range of custom synthesis options.
Flubrotizolam 0.5mg Pellets
Nathan Marshall
The product quality was good, but my order arrived a few days later than expected. Communication could be improved.
Flubrotizolam 0.5mg Pellets
Ema Romero
I’ve tried other brands, but Flubrotizolam 0.5mg pellets stand out for their consistent performance. Every dose feels exactly the same, providing great peace of mind
4-HO-MET 20mg Pellets
Ann Smith
Fast shipping and excellent support! I had a question about my order, and they responded immediately. The chemicals I received were exactly what I needed for my research
Request a Quote
Learn More From
Frequently Asked Questions
To place an order, simply browse our product categories, select the items you wish to purchase, click on the inquiry button to start a deal.
Yes, we offer worldwide shipping! We ensure that all packages are discreetly packaged and sent securely to your location.
All our research chemicals undergo thorough third-party testing to guarantee purity and quality. We source our products from reputable laboratories and maintain strict quality control standards.
Due to the nature of our products, we do not accept returns. However, if you receive a damaged or incorrect item, please contact us within 48 hours of delivery, and we will address the issue promptly.
If you have any questions or need assistance, you can reach our customer support team via email at sales@marquessilvaneves.com. We strive to respond to all inquiries within one hour.
Yes, we offer competitive pricing and discounts for bulk orders. Please contact us directly for more information on bulk pricing options.