Naphthalene Sulfonic Acids and Salts (NSAs) Group
Information sheet
These substances were identified for action under the Chemicals Management Plan (CMP). The screening assessment focuses on 6 substances referred to collectively under the CMP as the Naphthalene Sulfonic Acids and Salts (NSAs) Group.
| Substance group | CAS RN | Acronym | DSL name | Public comments on the draft screening assessment | Final screening assessment | Conclusion on section 64 criteria | Follow-up activities |
|---|---|---|---|---|---|---|---|
| NSAs Group | 1321-69-3Footnote a | NaNSA | Naphthalenesulfonic acid, sodium salt | HTML | HTML | Does not meet | None planned at this time |
| 25322-17-2Footnote a, Footnote c | DNNSA | Naphthalenesulfonic acid, dinonyl- | Significant New Activity (SNAc) provisions | ||||
| 25619-56-1Footnote a, Footnote c | BaDNNSA | Naphthalenesulfonic acid, dinonyl-, barium salt | SNAc provisions | ||||
| 57855-77-3Footnote a, Footnote b | CaDNNSA | Naphthalenesulfonic acid, dinonyl-, calcium salt | SNAc provisions | ||||
| 60223-95-2Footnote a, Footnote c | DNNDSA | Naphthalenedisulfonic acid, dinonyl- | None planned at this time | ||||
| 68425-61-6Footnote a | CDINSA | Naphthalenesulfonic acid, bis(1-methylethyl)-, compd. with cyclohexanamine (1:1) | None planned at this time | ||||
Follow-up activities
Although naphthalene sulfonic acids and their salts are not considered to be harmful to the environment at exposure levels estimated at the time of the assessment, DNNSA, BaDNNSA and CaDNNSA are considered to have ecological effects of concern due to their toxicity to aquatic organisms. Therefore, there may be a concern if exposure levels were to increase. The proposed follow-up activity is to apply the SNAc provisions of CEPA 1999 to those 3 substances.
| Date | Activity |
|---|---|
| June 10, 2023 | Publication in the Canada Gazette, Part I: Vol. 157, No. 23, of a notice of intent to amend the Domestic Substances List to apply the SNAc provisions of CEPA 1999 to DNNSA, BaDNNSA and CaDNNSA and start of a 60-day public comment period. |
| June 10, 2023 | Publication of the final screening assessment. The related notice was published in the Canada Gazette, Part I: Vol. 157, No. 23. |
| July 4, 2020 | Publication and start of 60-day public comment period on the draft screening assessment. The related notice was published in the Canada Gazette, Part I: Vol. 154, No. 27. |
Background
A seventh substance (CAS RN 25638-17-9) was identified as being a part of the NSAs Group at the outset of the third phase of the CMP. The conclusion for the substance with CAS RN 25638-17-9 is provided in the Final Screening Assessment for the Rapid Screening of Substances with Limited General Population Exposure.
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