# Sulfur dioxide — CGA cylinder valve connection number by gas

For Sulfur dioxide, source chart is CONCOA; cga connection number is 668/660; which chart the row is from is Pure Gases, recorded from its source on 2026-08-28.

- **Gas:** Sulfur dioxide _(verified: appears in the quote below)_
- **Source chart:** CONCOA _(our reading, not quoted from the source)_
- **CGA connection number:** 668/660 _(verified: appears in the quote below)_
- **Which chart the row is from:** Pure Gases _(our reading, not quoted from the source)_

## What the source says

> 668/660 Sulfur dioxide

## Sources disagree

More than one authority states this, and they do not state the same thing. Both are reproduced with the source each came from.

### CGA connection number

concoa.com says cga connection number is **668/660**, as of 2026-08-28.

> 668/660 Sulfur dioxide

Source: https://www.concoa.com/sites/default/files/ADC3010%20AF%20CGA%20selection%20charts.pdf

us.nipponsanso.com says cga connection number is **660****, as of 2026-08-28.

> Sulfur Dioxide 660**

Source: https://us.nipponsanso.com/pdfs/gasequipment/CGA-Connection-Chart.pdf


## Source

- https://www.concoa.com/sites/default/files/ADC3010%20AF%20CGA%20selection%20charts.pdf
- https://us.nipponsanso.com/pdfs/gasequipment/CGA-Connection-Chart.pdf

Last verified: 2026-08-28. Review by: 2028-08-27.
Part of [CGA cylinder valve connection number by gas](https://referencesource.org/cga-cylinder-valve-connection-by-gas/).