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Arch Therapeutics Obtains Additional Positive Safety Data for AC5 Surgical Hemostatic Device(TM) in Preclinical Toxicity Test of Sensitization

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Test Result Further Supports the AC5™ Biocompatibility Profile

FRAMINGHAM, MA -- (Marketwired) -- 09/08/15 -- Arch Therapeutics, Inc. (OTCQB: ARTH) ("Arch" or the "Company"), developer of the AC5 Surgical Hemostatic Device™ ("AC5™"), obtained favorable data from a preclinical toxicology test for AC5™ showing that the device did not cause sensitizing reactions in animals and is considered a "non-sensitizer." The test, called the Maximization Test, is a standardized test of contact sensitization and is performed in animals as a major component of the biocompatibility test panel that a medical device must typically complete successfully prior to use in humans. Testing was conducted under the guidelines provided by the International Organization for Standardization (ISO) and the study also complied with Good Laboratory Practice (GLP), a Federal regulation (21 CFR part 58) governing the conduct of nonclinical laboratory studies that support or are intended to support applications for research or marketing permits for products regulated by the Food and Drug Administration (FDA). AC5 is a development-stage hemostasis product being evaluated to control bleeding, mitigate fluid loss, and create an environment permissive to normal healing in order to provide more efficient surgical and interventional care.

In this standard in vivo study, designed to provide general information on the health hazards likely to arise from acute exposure to clinically relevant quantities of AC5, AC5 was well tolerated when using standardized success criteria based upon comparison with control materials. As a result, AC5 was classified as a non-sensitizer with no evidence of causing delayed contact sensitization. Results from this biocompatibility safety study indicate that AC5's peptide structure and mechanism of action, which is based on the formation of a local physical-mechanical barrier at the wound site, does not promote sensitization to the overall biological system following application of standardized AC5 extract solutions in animals. The results of this study provide further evidence of the absence of toxicity for AC5, and represent a critical step toward demonstrating biocompatibility of this medical device.

Arch Therapeutics President and CEO Terrence Norchi, MD, stated, "We remain pleased with the safety data generated for AC5, and we hope and anticipate that the safety profile of our products will represent an important distinguishing feature. This sensitization test adds to the portfolio of solid results. Tests such as this are important for us to be able to initiate our first clinical trial, which we intend to commence after we receive the go-ahead from the relevant bodies."

About Arch Therapeutics, Inc.
Arch Therapeutics, Inc. is a medical device company developing a novel approach to stop bleeding (hemostasis) and control leaking (sealant) during surgery and trauma care. Arch is developing products based on an innovative self-assembling peptide technology platform to make surgery and interventional care faster and safer for patients. Arch's flagship development stage product candidate, known as the AC5 Surgical Hemostatic Device, is being designed to achieve hemostasis in minimally invasive and open surgical procedures.

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On Behalf of the Board,
Terrence W. Norchi, MD
Arch Therapeutics, Inc.


ARTH Investor Relations
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Richard Davis
Chief Financial Officer
Arch Therapeutics, Inc.
Phone: 617-431-2308

Source: Arch Therapeutics, Inc.