Printech Archive, September, 1999: Re: 2,2,4 trimethylpentane (Isopar C) - usage and health, safety information

Re: 2,2,4 trimethylpentane (Isopar C) - usage and health, safety information

Jeff Adrian (
25 Aug 99 08:52:34 -0500

Message-Id: <>
Date: 25 Aug 99 08:52:34 -0500
From: Jeff Adrian <>
Subject: Re: 2,2,4 trimethylpentane (Isopar C) - usage and health, safety information
To: p2tech <>, printech <>

Re: 2,2,4 trimethylpentane (Isopar C) - us 8/25/99
Interesting question, whether lithographic inks contain Isopar C. I currently track all HAPs in our litho inks and can say that this is NOT present in our lithographic inks. What's more, I took the trouble to reaffirm this with our supplier's technical staff, and they have confirmed that Isopar C (and 2,2,4 trimethylpentane) is not in their inks.

For the record, our supplier is Flint Ink, one of the largest ink suppliers in the country.
Also, I am very familiar with cleaning solvent blends used in the printing industry, and I can confirm that Isopar C is not a component in any cleaning solvent blend I have encountered.

Also for the record, the HAPs that may be seen in lithographic inks include: Ethyl Benzene (100-41-4); Methyl Carbitol (111-77-3); Butyl Carbito (112-34-5); Hydroquinone (123-31-9); Butyl Carbitol acetate (124-17-4); Hydrochloric acid (7647-01-0); Xylene (1330-20-7); and Formaldehyde (50-00-0).
The above listed HAPs occur in very small quantities. Typically, in our experience, all HAPs combined account for about 2/10ths of one percent of product weight in our lithographic ink.

Hope this lends some clarity to your research, and to others who may have questions regarding HAPs in lithographic inks.

Jeff Adrian
Director, Environment & Safety
The John Roberts Company
> I am researching usage and health & saftey information on thirty >chemicals (HAPs). 2,2,4 trimethylpentane (aka iso-octane and a key component in >Isopar C) is one of those chemicals. This information will be placed on IDEM's >ToxWatch page which will include air monitoring data from eighty-seven >chemicals (thirty HAPs are a subset of this list) in four Indiana counties.
> From my research into Exxon products, Isopar C is used in lithographic >inks and possibly as a cleaning agent. What is the current usage of this >chemical? How wide spread is the use of this chemical? What are effective >substitutes (if any)? Please relate any other experiences you might have >had with using this material.
> Additionally, it is my understanding that Isopar C/2,2,4 >trimethylpentane might be found in pesticide formulations. Is this true? If yes, what >formulations? Who would manufacture the pesticide formulation so I could >obtain more information on proper usage?
> Some of the other Isopar formulations are used in every day consumer >products (deodorizers, cleaning agents, etc.). Does anyone know of the use of Isopar >C/2,2,4 trimethylpentane in any consumer product? I would doubt it, but I >want to check anyway. It would be quite ironic to monitor a HAP from an industrial >source where a HAP may be emitted in greater concentration in someone's home.
> I thank you for your assistance in this effort!
>Mark C. Stoddard
>Indiana Department of Environmental Management
>Compliance & Technical Assistance Program



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