3M 4251 Maintenance-Free Organic Vapour/Particulate Respirator P2 is the one we use. Its only a half mask so would require goggles to accompany it. It really depends on what work you are doing and what you are being exposed to.. Most PPE companies like 3M will offer advice if you tell them exactly what you are doing and what you can be exposed to

Hope it helps

Emmett

thank you Emmet Paul O Kane

First make a proper assessment of the size of the hazard.  My article on Vapour Hazard Index is readily available online, and is attached here.

Then look at your usage.  If you are competent in your handling there should be very little release of vapour in transferring from one vessel to another.  Providing you have eye protection and proper procedures in the case of a spillage accident, there may be no need for a mask.

If you are using larger quantities in more open fashion - for example some kind of bath to strip off polymer - then it should really not be in an open workroom, where you might be protected but your colleagues are not.  It should be under some kind of fume hood or have local extracts.

A mask may be appropriate if you have to do a large transfer say between drums and smaller containers in a store or pilot plant area.  If this is regular work, an air-supplied mask may be needed.

Thank you very much Martin John Pitt

Can you provide more detail on the type of solvent (chemical names) you're using and how you're using it?

Dear Emmett,

do you think this respirator would be also suitable for me if I work with DMAc and NMP? Thank you.

I am using Petroleum ether, chloroform, ethylacetate and methanol for soxhlet extraction method. And I used to keep them under fume hood for evoporation of solvents. 

What is the best resoirator for working with organic solvents such as: Petroleum ether, chloroform, ethylacetate and methanol in extraction .

thanks in advance

Your laboratory need engineering controls. What is the status of the chemical hoods and the exhausting system you have?

The mask is the last and least efficient method and you better monitor the VOCs content and then install proper ventilation methods as you cannot keep 100% trust on masks.

can anyone suggest masks for using NMP, benzene etc., solvents,strong acids like HF sulphuric acid, chloroform, ethylacetate and methanol