
Specialized RX
Bitter-Bloc™ WS Liquid Concentrate
Bitter-Bloc™ WS Liquid Concentrate is an anhydrous, water soluble liquid concentrate Bitter-Bloc™ formula. All natural plant derived ingredients, non-GMO, preservative and dye free, GRAS status/organic, no allergy declarations. Suggested starting use conc.: 600 ppm (0.06%)
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Bitter-Bloc™ WS Liquid Concentrate Use:
- Concentration Level: 60,000 ppm
- Suggested Starting Use Level: 600 ppm
- Mean Drop Vol: (0.016%)
- 1 mL Avg: 40 ?l (25 drops = 1 mL)
- In a 30 mL preparation, 0.08 mL (2 drops) = 160 ppm; 0.4 mL = 800 ppm
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In a 150 mL preparation, 0.4 mL (10 drops) = 160 ppm; 2.0mL = 800 ppm
How Bitter-Bloc™ Technology Works:
Bitter-Bloc™ is an advanced protein technology that naturally blocks flavor defects in various applications, addressing palatability issues found in many APIs and excipients. Unlike other products that merely mask unpleasant flavors, this innovative solution effectively prevents these defects from reaching taste buds, resulting in a cleaner taste profile. This organic, water-soluble protein has been validated by third-party studies to modulate over 16 of the 25 bitter taste receptors on the tongue, significantly reducing bitterness perception. Additionally, it eliminates salty, metallic, astringent, and other off-notes in liquid, powder, or tablet-based oral formulations. With its versatile formulation capabilities, this protein technology offers a comprehensive solution for improving the taste profiles of compounded prescriptions, enhancing patient compliance and satisfaction.

Q: How much Bitter-Bloc™ do I need?
A: Typically, the more bitter something is, the more Bitter-Bloc™ is needed. Typically, most aqueous formulas are effective around 100-500 ppm.
Q: Is Bitter-Bloc™ a sweetness modulator?
A: Bitter-Bloc™ is not a sweetness modulator as it does not affect
sweetness. However, in some cases tasters will notice an enhanced flavor profile. Since bitterness is a strong flavor, it often will overpower the other flavors present. Bitter-Bloc™ will bring down the bitterness perception to the point that other flavors are able to be better perceived.
Q: Are there any applications where Bitter-Bloc™ will not work?
A: Although Bitter-Bloc™ is effective in most applications, it will not work with an active organism present such as an active probiotic.
Additional Information:
Taste Receptor Activity and Stevia Case Studies: PDF
Compounding Chemicals is a licenced TGA Australian supplier.
Our quality management system is certified to AS/NZS ISO 9001:2015.
We hold a TGA Licence to manufacture Therapeutic Goods
(Licence # MI-2019-LI-11427-1).
Spectrum is a FDA approved supplier who adhere to strict Good Manufacturing Practices (cGMP).
GMP Product Logo indicates material is sourced from GMP Certified Manufacturing Facility.
- Spectrum USA stock ships every Friday for next week delivery.
- SpecializedRX USA stock ships alternate weeks.
Call to confirm non-stock ETA.
Local stock. Order now and receive your item in 1-3 business days Australia wide.
All orders over $200 receive free shipping within Australia. Dangerous Goods Shipping Fees apply.
- Spectrum USA stock ships every Friday for next week delivery.
- SpecializedRX USA stock ships alternate weeks.
Call to confirm non-stock ETA.
Bitter-Bloc™ WS Liquid Concentrate
Quality Commitment
Compounding Chemicals is a licenced TGA Australian supplier.
Our quality management system is certified to AS/NZS ISO 9001:2015.
We hold a TGA Licence to manufacture Therapeutic Goods (Licence # MI-2019-LI-11427-1).
Spectrum is a FDA approved supplier who adhere to strict Good Manufacturing Practices (cGMP).
For further enquiries, give us a call (02 9540 2055) or email our friendly sales team (sales@astralscientific.com.au).
For more informationIt's displaying call to confirm stock, how long will delivery take?
Most special orders will take approx. 10-15 business days to arrive. Back order dates on USA stock may vary. Our customer service team will advise you of all lead times once your order is placed.
What is the lead time for USA Stock?
Place your order before 3pm Friday to receive USA Stock items the following week. For all other orders, our friendly customer service team will contact you with a lead time once your order is placed.
What happens if there are two expiry dates available on the website?
The shorter date will be sold at the special price advertised online.
Do you price match or provide bulk quantities?
At Compounding Chemicals, we offer low and competitive prices. If you receive a quote with a lower price than ours, contact our sales team with details of the chemical (product name and code, CAS number) and our team will assist you.
Price match may not be applicable to special orders, terms and conditions apply.
We are also happy to provide special prices on bulk quantities, give us a call (02 9540 2055) or email our sales team (sales@astralscientific.com.au) to enquire.
How much does shipping cost?
All orders over $200 receive free shipping.
For all orders under $200, shipping fees apply:
- New South Wales, South Australia, Victoria and ACT = $35
- Queensland, Northern Territory, Tasmania and Western Australia = $45
- Dangerous Goods Shipping Fees also apply – our customer service
team will advise before processing your order.
Do you provide expiry dates and Certificates of Analysis?
Compounding Chemicals is a TGA licenced supplier. We ship all chemicals with a Certificate of Analysis (COA) and adequate / long expiry on all material. If material is short dated, our customer service team will contact you prior to shipping to confirm. Most items have the expiry date and Certificate of Analysis available on our website for your convenience.