A-A-33 Scale Removing Compound (Liquid)This CID covers a liquid form scale removing compound, hereafter referred to as "compound," intended for removing scale deposits from environmental surfaces, commercial dishwashing machines, and boiler coilers. This compound can be used in laboratories, food handling and processing areas, veterinary areas, and dairy plants.

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2.1.5 Excluded ingredients. The compound shall not contain sulfuric acid or organic solvents.

2.2 Surface tension. The compound shall have a surface tension not greater than 8.08 x 10-3poundals per inch (44.0 dynes per centimeter) when measured in accordance with ASTM D1331 using a sample at 77°F (25°C) in a 1% aqueous solution.

2.3 Corrosive effects on steel. The compound, in a 1% distilled aqueous solution, shall have a corrosive effect on steel of not more than 0.15% loss of mass on 2 inch by 2 inch by 0.053 inch thick (51mm X 51mm X 0.89mm thick) coupons of hot rolled steel after a 24 hour period of immersion in the compound.

2.4 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.

2.5 Foaming. The compound shall exhibit no foam at temperatures above 100°F (38°C).

2.6 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.)