Page 23 - PPE GUIDELINE

Guidelines on the Use of PPE Against Chemical Hazards

Table 4: Filter Media Selection

Contaminants Filter media

Dust, Mist, Particulates filter:
Fumes N95, R95, P95, N99, R99, P99, N100, R100, P100
•N-Series: Not for oil
–Approved for non-oil particulate contaminants
–Examples: dusts, fumes, mists not containing oil

•R-Series: Resistant to oil
–Approved for all particulate contaminants
–Examples: dusts, fumes, mists (including those containing oils)
–Time restriction of 8 hours when oils are present

•P-Series: Oil Proof
–Approved for all particulate contaminants
–Examples: dusts, fumes, mists (including those containing oils)

•Efficiency Level: 95%, 99%, 99.97%
eg. N95 means the filter media has at least 95% efficiency tested at
0.3 micrometer and it can only be used in non-oil environment.

Gases and Chemical Cartridges (type and colour code):
Vapour Organic Vapour (OV) - Black
Acid Gas (AG) – White
OV/AG combination – Yellow
Ammonia / Methylamine – Green
Formaldehyde – Olive
Multi-Gas and Vapour (combination of all the above) – Light
Brown
Mercury / Chlorine – Orange

Respirator Fit Test

Employees required to wear a tight-fitting respirator must be fitted properly and tested
for face seal leakage before using the respirator in a contaminated area. Fit testing
helps determine that a particular model and size of respirator fits a worker so there is
minimal face seal leakage. It shall be conducted for all tight-fitting air purifying and
supplied-air respirator, including SCBA.

Department of Occupational Safety & Health, Ministry of Human Resources, Malaysia ™October 2005 23