File No: NA/613 October 1998

NATIONAL INDUSTRIAL CHEMICALS NOTIFICATION AND ASSESSMENT SCHEME

FULL PUBLIC REPORT

Cyasorb UV-1164

This Assessment has been compiled in accordance with the provisions of the Industrial Chemicals (Notification and Assessment) Act 1989 (the Act) and Regulations. This legislation is an Act of the Commonwealth of Australia. The National Industrial Chemicals Notification and Assessment Scheme (NICNAS) is administered by the National Occupational Health and Safety Commission which also conducts the occupational health & safety assessment. The assessment of environmental hazard is conducted by the Department of the Environment and the assessment of public health is conducted by the Department of Health and Family Services.

For the purposes of subsection 78(1) of the Act, copies of this full public report may be inspected by the public at the Library, National Occupational Health and Safety Commission, 92-94 Parramatta Road, Camperdown NSW 2050, between the following hours:

Monday Wednesday8.30 am - 5.00 pm Thursday8.30 am - 8.00 pm

Friday8.30 am - 5.00 pm

Copies of the full public report may also be requested, free of charge, by contacting the Administration Coordinator.

Please direct enquiries or requests for full public reports to the Administration Coordinator at:

Street Address:92 Parramatta Road, CAMPERDOWN NSW 2050, AUSTRALIA

Postal Address:GPO Box 58, SYDNEY NSW 2001, AUSTRALIA

Telephone:(61) (02) 9577 9514

Facsimile:(61) (02) 9577 9465

Director

Chemicals Notification and Assessment

NA/613

FULL PUBLIC REPORT

Cyasorb UV-1164

1. APPLICANT

Cytec Australia Holdings Pty Ltd of Suite 1, 7 11 Railway Street BAULKHAM HILLS NSW 2153 has submitted a standard notification statement in support of their application for an assessment certificate for Cyasorb UV-1164.

2. IDENTITY OF THE CHEMICAL

Trade Name:Cyagard UV-1164 UV-1164

CT-375-88 CT-483-91

Marketing Name:Cyasorb UV-1164

3. PHYSICAL AND CHEMICAL PROPERTIES

Appearance at 20C

and 101.3 kPa:pale yellow powder

Melting Point:91.6 + 0.2C

Density:1 150.9 + 0.25 kg/m3

Vapour Pressure:8.44 x 10-2 kPa at 40C

Water Solubility:0.04 to 0.07 mg/L at 25C

Partition Co-efficient

(n-octanol/water):not determined, see comments below

FULL PUBLIC REPORT NA/613

4

Hydrolysis as a Function

of pH:not determined, see comments below Adsorption/Desorption:Koc = 9.7 x 108 (calculated) Dissociation Constant:not determined, see comments below

Flash Point:not determined

Flammability Limits:not determined Autoignition Temperature:> 350C Explosive Properties:not explosive

Reactivity/Stability:not reactive

Particle Size:4.4 + 3.9 m

Comments on Physico-Chemical Properties

Tests were performed according to EEC/OECD test guidelines at facilities complying with OECD Principles of Good Laboratory Practice.

No studies on the hydrolytic stability of the notified chemical were supplied. This is acceptable as the notified substance contains no readily hydrolysable groups and has very low solubility in water (0.04 to 0.07 ppm). Therefore, hydrolysis is unlikely under environmental conditions.

The partition coefficient of the notified chemical has not been determined. Based on the low water solubility it is expected that the chemical will have a high partition coefficient and adsorb strongly to soils and sediments. The strong binding to soils is confirmed by the calculated KOC using the atom/fragment contribution method developed by Syracuse Research Corporation. The KOC was calculated for the electrically neutral (non-dissociated) molecule. As the chemical contains groups which are expected to dissociate and associate at various pHs (see below) the KOC of the chemical is expected to show a pH dependence. However, given the magnitude of the calculated KOC this variation is expected to have little effect on the behaviour of the chemical in the environment where it is expected to be tightly bound to soils and sediment.

Dissociation tests were not conducted due to the low water solubility and relatively high molecular weight of the notified chemical. The weak acidity of the phenolic functionality of the notified chemical would suggest some solubility in highly basic media (pKa phenol 9.89), while the weak basicity of the triazine nitrogens may impart solubility at low pH (pKa of azine conjugate acid 5.18).

4. PURITY OF THE CHEMICAL Degree of Purity:high

Toxic or Hazardous

Impurities:none known

Non-hazardous Impurities

(> 1% by weight):none

Additives/Adjuvants:none

5. USE, VOLUME AND FORMULATION

The notified chemical will not be manufactured in Australia but will be imported in powder form, and will be used as a light stabiliser for applications involving high temperature processed polymers and industrial baked coating systems. The current use will be in the area of engineering resin manufacture and later for the automotive top coat market and exterior building applications.

It is estimated that 500 to 1 000 kg per annum of the notified chemical will be imported in the first three years. However, there is the possibility that it may exceed 1 000 kg, depending on market demand.

6. OCCUPATIONAL EXPOSURE

The notified chemical will be imported into Australia in 20 or 57 kg plastic bags packed in fibreboard cartons. The total import volume will be transported by road to United Transport Services warehouse at Arndell Park NSW for storage prior to transportation to the customer site. The following categories and number of workers may be exposed to the notified chemical during importation, reformulation and application.

Category of workers

Number

Hours/day

days/year

Waterside workers

5-10

2-3

10-20

Transport drivers

5-10

2-3

10-20

Plant operators

4-20

2

10

Laboratory

2-4

1

10

technicians

Waterside Transport and Storage

For waterside, transport and warehouse workers, there is not expected to be any exposure to the notified chemical during storage and distribution, except in the event of a spill.

Manufacture-Masterbatch

A master batch is a solid mixture consisting of the notified chemical and other components in a suitable carrier polymer. The masterbatch is either extruded into pellets (~ 5 mm width) or will form the first stage of plastic bag manufacture. The process for formulating a master batch consists of weighing and blending of the notified chemical with other ingredients to produce resin solids.

Blending and encapsulation

Dermal, ocular and inhalation exposure is expected during blending operations as workers empty bags of the notified chemical into the feed hopper of the blending vessel and during changing of filter bags of the dust extraction system of the two hoppers. The loading area is subject to general ventilation with local exhaust ventilation in place over the hoppers to capture airborne particles. The hopper also has a door which is kept closed, except when loading. During loading operations the plant operators will be attired with overalls, gloves, a head covering, half-face respirator and safety glasses.

From the hopper the notified chemical drops via gravity to the blending vessel where blending is carried out in closed/sealed mixers. The mixed product containing the notified chemical is then fed into an extruder where it is completely dissolved and encapsulates the polymer. Exposure to the notified chemical may occur following extrusion of the notified chemical into its encapsulated form, either as pellets or as the final product (eg bag). If the final product is in pellet form the product will be extruded in spaghetti-like strings. These are passed through a water bath into a pelletiser, a classifier and finally a hopper for storage before being bagged. Alternatively, the product may be extruded as a bubble-type, cylinderical tube, which is air blown and cooled, and cut into lengths to form plastic bags.

Laboratory analysis

A laboratory technician will be exposed to the notified chemical during sample collection. Up to 3 samples per five tonne per batch are collected by scooping the notified chemical into a container which is then subjected to a series of quality control tests in the laboratory. The notifier states laboratory technicians are required to wear appropriate laboratory coats, safety glasses and gloves, during sampling and analysis.

No details were provided on the end use of the pellets

7. PUBLIC EXPOSURE

The notified chemical is for industrial use only. The potential for public exposure to the notified chemical during transport and industrial use or from disposal is assessed as negligible. Although the public will make dermal contact with the final products (eg plastic mulded forms; paintd surface on automotive) containing the notified chemical (approximately 1 to

5%), exposure will be negligible since the notified chemical (at a low concentrtion) will be in an encapsulated form, will not leach out and hence will not be bioavailable.

8. ENVIRONMENTAL EXPOSURE Release

Under normal conditions it is not expected that the chemical would be released during storage and transportation. The Material Safety Data Sheet (MSDS) contains adequate instructions for handling a spill should one occur.

Empty containers used to hold the notified substance will be disposed of to landfill. The notifier has estimated that t