Hazard search
Methylene-bis-(4-cyclohexylisocyanate)
- CAS number
- 5124-30-1
- Also known as
- 1,1'-Methylenebis(4-isocyanatocyclohexane) · 4,4'-Methylene-bis(cyclohexyl isocyanate) · 4,4'-methylenedicyclohexyl diisocyanate · HMDI · Hydrogenated MDI · Methylene-bis-(4-cyclohexylisocyanate) (isocyanates, total)
UK workplace exposure limits
| Limit | Value | Applies to |
|---|---|---|
| 8-hour TWA | 0.02 mg/m³ | |
| 15-minute STEL | 0.07 mg/m³ |
Notations
- Sen: can cause sensitisation
Sampling methods
| Method | Sampling | Medium | Analysis | Part numbers |
|---|---|---|---|---|
| MDHS 25/4 Organic Isocyanates in air (aerosols) by HPLC -EC Method document (opens in a new tab) | Active (pump) | Midget impinger & coated glass fibre filter | 225-36-4 225-22 | |
| MDHS 25/4 Organic Isocyanates in air (vapours only) by HPLC -EC Method document (opens in a new tab) | Active (pump) | Stainless Steel IOM with coated glass fibre filter | 225-79A | |
| MDHS 25/4 Organic Isocyanates in air (aerosols per Appendix 2) by HPLC -EC Method document (opens in a new tab) | Active (pump) | Stainless Steel IOM with coated glass fibre filter(s) | 225-79A | |
| NIOSH 5525 Isocyanates, total (MAP) (Aerosols of aromatic isocyanates >2 µm) by HPLC -UV/FD Method document (opens in a new tab) | Active (pump) | Impinger | 225-36-1 225-22 | |
| NIOSH 5525 Isocyanates, total (MAP) (Aerosols of aromatic isocyanates) by HPLC -UV/FD Method document (opens in a new tab) | Active (pump) | Impinger with coated glass fibre filter | HPLC-UV | 225-7 225-4 225-27 225-36-1 225-22 225-702 225-76A |
| NIOSH 5525 Isocyanates, total (MAP) (Vapour only) by HPLC -UV/FD Method document (opens in a new tab) | Active (pump) | Stainless steel IOM with coated glass fibre filter | 225-76A 225-702 | |
| OSHA 5002 Organic Vapour Sampling Group 3-diisocyanates- by UHPLC-FD Method document (opens in a new tab) | Active (pump) | Glass fibre filter & support pad in open-face cassette | HPLC-UV or HPLC-FD | 225-9002 225-9013 |
| OSHA 5002 Organic Vapour Sampling Group 3 by UHPLC-FLR Method document (opens in a new tab) | Active (pump) | Open-face cassette with Glass Fibre Filter & support pad (page 2 of method) | 225-3250 225-7 225-27 |
Methods and limits as published by their agencies and summarised by SKC; check the current method and the limit that applies to you before sampling.
Source: SKC Ltd (UK), Hazard Search, used with SKC's permission (opens in a new tab); SKC Inc. (USA), Sampling Guides, used with SKC's permission (opens in a new tab)