A-A-19 Scale Removing Compound (Powder, Sulfamic Acid)This CID covers a powder form scale removing compound, hereafter referred to as "compound", intended for removing scale deposits normally found in salt water evaporators, fresh water cooling and distribution systems, and water side scale found in heat transfer units. This compound can be used for removing scale deposits normally found in commercial dishwashing machines.

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by 0.035 inch thick (51mm X 51mm X 0.89mm thick) coupons of hot rolled steel after a 24 hour period of immersion in the solution.

2.3 Nonvolatile matter. The compound shall have a nonvolatile matter content of not less than 30.0% at 221°F (105°C) when determined in accordance with ASTM D2834.

2.4 Identification and markings. Identification and markings shall be permanent and legible and shall include, as a minimum, the manufacturer’s identification code (CAGE) and labeling with instructions for use.

3. REGULATORY REQUIREMENTS.

3.1 Hazardous materials. The compound shall meet all applicable Federal codes and regulations concerning hazardous materials, including package marking.

4. PRODUCT CONFORMANCE PROVISIONS.

4.1 Product conformance. The product shall meet the salient characteristics of this CID, conform to the producer’s own drawings, specifications, standards, and quality assurance practices, and be the same product offered for sale in the commercial market. The Government reserves the right to require proof of such conformance.

4.2 Market acceptability. The compound shall have been sold previously to the Government or to the commercial market in order to qualify for acceptability under this CID

5. PACKAGING. Preservation, packaging, and marking shall be as specified in the contract or order (see 6.2).

6. NOTES. (This section contains information of a general or explanatory nature that may be helpful but is not mandatory.)

6.1 Referenced documents.

American Society for Testing and Materials (ASTM)

D2834 – Standard Test Method for Nonvolatile Matter (Total Solids) in Water-Emulsion Floor Polishes, Solvent-Based Floor Polishes, and Polymer Emulsion Floor Polishes

E70 – Standard Test Method for pH of Aqueous Solutions with Glass Electrode AASHTO T200

Copies of these documents can be obtained online at https://www.astm.org or from American Society for Testing and Materials, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.