I have enough evidence. AV = Acid Value, a measured property (mg KOH/g) of the 9076 batch, with the summary-report target column "av - 43.2" (target, not measured).

## Answer

"AV" in the 9076 records is the abbreviation for Acid Value — a measured quality/chemical property of the 9076 batch, expressed in mg KOH/g (mg OH/g). It is one of the standard batch characterization columns, listed alongside IV (iodine value), %P content, SAP (saponification value), and Amine Value.

Evidence:

• The 9076 ppt spells it out as "Acid Value … mg OH / g" for P-9076 [9076 ppt, slide 1], and in the "9076 equivalent trial batch Data" table the same column is abbreviated "AV" next to IV, %P Content, SAP, and "Amine value" [9076 ppt, slide 32].
• The Old ELN Summary Report uses the same abbreviations as column headers: "av - 43.2" and "aminev - 30.1" [Old ELN SummaryReport (2), sheet Sheet_JS, header row].

The "43.2" in the header ("av - 43.2") is the target/specification value for acid value (part of the 43.2 / 30.1 target pair — acid value 43.2, amine value 30.1), not a measured result. Actual measured acid values vary by batch (e.g., LBN 42 = 40.5, LBN 41 = 38.7, LBN 28 A = 42.5 in the summary table).

Note: I have only the abbreviation "AV" in the structured records; its full spelling "Acid Value" is confirmed from the original documents above, not stored as a field in the records.