RatCol® High Concentration Type I Acid Soluble Rat Tail Collagen contains 100 mg at a concentration of approximately 10 mg/mL in a 0.02M acetic acid solution (~pH 3). RatCol® collagen is soluble telo-collagen. This collagen product is provided in user-friendly packaging for use and storage. This product is sterile filtered and is supplied as a ready to use solution.