FLOPAM FO 8990 Equivalent: Bare and SH Cationic PAM Selection

Our factual basis for this page is a single historical document: SNF SAS Catalogue 2007 Poudres. On page 13 it lists FLOPAM FO 8990 and FLOPAM FO 8990 SH. Both are described, on SNF’s own descriptive scale, as Very High charge and Standard molecular weight. FO 8990 is printed at Brookfield 600, 300 and 110 cps for 5, 2.5 and 1 g/L solutions, with a make-up line of 4 g/L recommended, 20 g/L maximum and 60 minutes. FO 8990 SH is printed at 700, 350 and 110 cps on the same three concentrations, with 4 g/L recommended, 10 g/L maximum and 60 minutes.

That is the extent of it. The catalogue is from 2007, its own text describes the figures as indicative average values, and it is not a current SNF specification. It says nothing about what SNF sells today, at what specification, or on what lead time. Anything on this page beyond the two rows above and our own published parameters is written as an open item, not as a conclusion.

The two rows carry the same charge and molecular-weight descriptors but different published numbers. Viscosity differs at 5 and 2.5 g/L — 600 against 700, and 300 against 350 — while the 1 g/L figures are close, 110 on both. The published maximum make-up concentration differs by a wider margin, 20 g/L against 10 g/L.

We do not explain why the source prints them differently; the catalogue does not say, and we will not invent a reason. What follows practically is narrower: if an enquiry arrives as FO 8990 without a suffix, we cannot tell which row you are holding, and the difference between the rows is the only distinction the source gives us. So we ask for the complete label, or a photograph of the bag, before quoting a route.

SNF’s page 13 rows use the descriptor Standard for molecular weight. Our current public master does not contain a band by that name. That is the honest position, and it is worth stating early rather than at the bottom of a page.

It would be easy to write that one of our bands sits just above or just below SNF’s Standard. We do not, because nothing in our source supports it. The two vocabularies were written by different companies for their own product ranges, with no shared reference point, no shared test method disclosed, and no published mapping. Ranking one against the other would be an inference dressed up as a specification. Which of our grades we quote against an FO 8990 enquiry is decided when we review the enquiry, and it is confirmed by comparison on your own material — not by lining up two sets of adjectives.

What we will state is which of our own routes are in scope, so the page is not vague about it. Two candidate routes are open for FO 8990 and FO 8990 SH enquiries: our Medium-molecular-weight / High-charge cationic powder route, where solution handling and a lower chain-length position govern the duty, and our Very-high-molecular-weight / Very-high-charge cationic powder route, where charge demand and bridging govern it. Both band pairs are named on our own scale and nowhere else. Neither route is offered as an equivalent of the Standard molecular-weight descriptor on the SNF rows, neither is placed above or below it, and we claim no mechanistic advantage for either route over the other or over the FLOPAM grade. A comparison run on your own material is what decides between them.

The commercial part is not in doubt. We supply cationic polyacrylamide powder, we can quote against a confirmed FO 8990 or FO 8990 SH label, and we can discuss pricing, sample arrangements and review of the applicable product documents as soon as the enquiry arrives. Send the grade string and your required quantity and we will take it from there.

The open items are equally clear. We do not hold a current SNF specification, we hold no figure for these grades beyond page 13, and we do not claim an exact or identical match. The trial closes those gaps: a candidate grade of ours run against the grade you currently use, on your own material, at several dose rates, under your own make-up conditions, with your make-up concentration checked against our 1–3 g/L window beforehand. That produces measurements from your site, which is a better basis for a purchase than any reading of a nineteen-year-old table.