Product In Focus

Biotin N-Hydroxysuccinimide ester - 
CAS 35013-72-0




News & Event updates:

10.8.2020: new product list available - find out more in our download center

1.8.2020: New products in focus:

N,N-Hexamethylenebis(maleimide) - CAS 4856-87-5, and other homologues.
Biotin N-Hydroxysuccinimide ester - CAS 35013-72-0
3-maleimidopropionic acid N-hydroxysuccinimide ester - CAS 55750-62-4
Mono-Benzyltetraethylene Glycol CAS 86259-87-2,
and it's Tosylate CAS 89346-82-7!

21.7.2020: New company presentation available Sostie Biotech and Sostie Chemistry in our download center !


NEW source of DAPI (4‘,6-Diamidino-2-phenylindole dihydrochloride)! 
CAS: 28718-90-3
Excellent EU manufacturer! Purity >98% 
We can now offer very competitive quotes and immediate shipment from stock!

10.6.2020: new updated product list uploaded on our website! Discover new compounds and possibilities!

5.5.2020: Biotechnology is an important part of our company. We are cooperating with an Austrian enzyme engineering company, and many CMOs and CROs in biotechnology, protein-, peptides-, carbohydrates chemistry and nucleotides for pharma, cosmetics and for diagnostic use from all over the world. To strengthen our activities in this areas we welcome Kristina Glusciukaite as a new member in our Business development team. She is a Biotechnologist and Microbiologist and will maintain and expand our marketing activities in this field! We wish you a good start and tons of success.

1.4.2020: We qualified a new great European manufacturing source of 5-Aminofluorescein CAS 3326-34-95-Aminofluorescein is used as an Fluorescence labeling reagent for proteins and used in the fluorescent antibody technique for fast identification of pathogens. Also used as an intraoperative Fluorescence staining of malignant brain tumors using 5-Aminofluorescein-labeled Albumin. Beside the application as a diagnostic reagent it also utilized as a building block for pharma ingredients.

24.3.2020Enzymes are an important and fast growing part in many industries! Our Enzyme specialist partner has now available new information regarding their new catalase as a neutralizer, a patented formulation, as replacement or extension to the use of pyruvate. e.g. - for the utilization in environmental monitoring applications.

17.3.2020: Based on the pandemic Corona disease the CPHI North America is postponed to September this year. Even we organized to participate in May, we will not participate in September. Looking forward hopefully meeting our partners at Chemspec in Cologne and at CPHI Milano in October. 

24.2.2020: High sophisticated Enzyme technology. If you are hunting for the right enzyme engineers - we have the solution for you! A great partnership with a well established and well know local company with excellent track record for your individual challenge!

19.2.2020: NEW company presentation available for download on our website, also updated product list for your download!

14.2.2020: Product in Focus: Xylidyl Blue Na salt CAS 14936-97-1

3.2.2020: Xylidyl Blue Na salt CAS 14936-97-1 - final development is done! We have established a great source in Europe with highest purity and reliability. Perfect for diagnostic applications. Now ready for inquiries.

28.1.2020: We are on LinkedIn! Search for Sostie Inc!

2.1.2020: Happy New Year! 

We´ll participate in 2020 on following exhibitions:

- CPHI North America May, 5-7th 

- Chemspec Cologne May, 27-28th 

- CPHI Worldwide Milano Oct, 13-15th

29.10.2019: Product in Focus: Pt(II) meso-Tetra(pentafluorophenyl)porphine 

CAS 109781-47-7

4.10.2019: Preparing for CPHI 2019 in Frankfurt! Contact us now for scheduling our meeting!

7.9.2019: Update of our product list and API list - watch out for the new products, made in CEE/US

30.8.2019: Product in Focus: Trimethylchlororsilane, CAS 75-77-4 

1.8.2019: SOSTIE celebrates 5 years anniversary!!! We are so proud and honored to support so many clients in a friendly and positive way! We are looking forward to our next 5 years to come with big potentials and more satisfied clients and manufacturing partners!

9.7.2019: New partnership for Sostie in CEE for production & R&D

7.6.2019: See you in Basel at Chemspec

20.5.2019: Product in Focus: Ergocalciferol made in CEE

16.4.2019: Next stop Chemspec in Basel! June 2019!

13.3.2019: Just one month left for CPhI North America! Schedule your appointment with us today.

1.3.2019: Product in Focus: 4-Methyl-4H-1,2,4-triazole-3-thiol,CAS 24854-43-1

7.2.2019: Updated company presentation and product lists! Watch out now!

7.1.2019: We attend this year at CPHI North America(30.4.-2.5), Chemspec in Basel (26/27.6.) and CPHI worldwide in Frankfurt (5.-7.11.)! Get in touch to arrange meetings with us!

2.1.2019: We wish all our partners and clients a healthy and successful 2019!

12.12.2018: Product in Focus: 2,4-Dihydroxyquinoline CAS 86-95-3

10.10.2018: Products in Focus: Enzymes & Biocatalysts - LIPASES, ß-Lactamases, Peroxidases, Phospholipases, other Enzymes

3.9.2018: We expand our team - looking for sales & business development people! Send your resume today to

1.8.2018: We are attending CPhI Madrid - We are pleased meeting you!

15.6.2018: New partnership with Austrian company Eucodis, specialized in Enzyme engineering! Get your info today!

1.6. Product in focus: Methylvinylketone CAS 78-94-4 , Made in CEE

16.4.2018: We are attending Chemspec in Cologne on 20/21.June 2018 - Schedule your Meeting with us today!

03/2018: Product in Focus: Ethyl-N-(Cyanoacetyl) Carbamate CAS 6629-04-5

02/2018: We are expanding our list of partners for new territorial areas! Check out - our new possibilities!

01/2018: Product in Focus: 3,4-Epoxy-1-butene CAS 930-22-3

12/2017: Product in Focus: N-[4-(2,4-Di-tert.pentylphenoxy)Butyl]-1-hydroxy-2-naphtamide 

22.12.2017: Best Christmas wishes for you and your family and all the best for 2018!

8.11.2017: Cooperation Agreement signed with Zembronice in Nigeria for African Business development 

10/2017 Product in Focus: 10-Bromo-1Decanol from European source, CAS 53463-68-6 (competitive pricing!!)

24.- 26. 10. 2017: Attending CPhI in Frankfurt- Schedule your meeting with us today!

01.07. 2017: We have more than 6000 compounds manufactured in Central/Eastern Europe in our updated product list!.

01. 06. 2017: Welcome our new staff member Marin! She´s responsible for our Marketing!

12. 03. 2017: We are attending CHEMSPEC in Europe (30.5./1.6. - Munich)!

03.11. 2016: Check out our new updated product list! Already ore than 5000 compounds available on regular base, manufactured in Central/Eastern Europe! PLUS great taylor made CM opportunities for our clients!

10. 08. 2016: We are attending CPhI in Barcelona! Schedule your meeting with us!

14. 06. 2016: Check out new updated Sostie product list

01. 04. 2016:We are attending CHEMSPEC in Basel in June this year! Schedule your meeting with us today!

01. 03. 2016: Softie Inc., located in Bonita Springs is founded successfully!

09. 02. 2016: Pleas find new company presentation and product list for your download!

23. 12. 2015: We wish you happy holidays and a successful New Year 2016!