据欧盟食品安全局（EFSA）消息，应欧盟委员会的要求，7月19日欧盟食品安全局就苯甲酸钠作为青贮饲料添加剂的安全性与效能发布了科学意见。
经过相关评定，欧盟专家组认为，按照最大剂量2 400 mg/kg使用苯甲酸钠作为青贮饲料添加剂时，不会对人畜的健康构成威胁。
部分原文报道如下：
Following a request from the European Commission, the Panel on Additives and Products or Substances used in Animal Feed (FEEDAP) was asked to deliver a scientific opinion on the safety for the target animals, consumer, user and the environment and on the efficacy of the product sodium benzoate, to be used as a technological additive intended to improve the ensiling process at a proposed dose of 2 400 mg/kg fresh matter, the eventual use of the silage being for pigs, poultry, bovines, ovines, goats, rabbits and horses.
The application of sodium benzoate in the preparation of silage up to the maximum proposed dose of 2 400 mg/kg forage was safe for the target animals.
The proposed maximum dose of sodium benzoate was estimated to result in a comparable consumer exposure as does its use as preservative in other feedingstuffs and to make a minimal contribution to consumer exposure. The FEEDAP Panel concluded that sodium benzoate when used as a silage additive is safe for the consumer.
Sodium benzoate is not considered as a skin irritant but may be mildly irritant to the eyes. As no data on sensitisation appear to be available, the FEEDAP Panel considered it prudent to treat sodium benzoate as a potential sensitiser. In the absence of information on particle size and dusting potential, a risk from inhalation cannot be excluded.
The FEEDAP Panel concluded that there are no safety concerns for the environment resulting from the use of sodium benzoate as a silage additive.
Three studies with laboratory-scale silos are described, each lasting at least 90 days. In the first study, sodium benzoate was added to ten forage materials covering a range of dry matter (DM) content (19–28 %) with differing water-soluble carbohydrate content (WSC, 1.0–3.8 %). In the second study two batches of whole-crop maize, varying in DM (38.0 % and 45.1 %) and WSC contents (4.4 % and 2.9 %), were used and in the third study the forage treated was a corn cob mix (65.6 % DM and 1.5 % WSC). In each case, replicate silos containing treated forage were compared with identical silos containing the same untreated forage. The results showed that sodium benzoate at the recommended dose has the potential to improve the production of silage by reducing pH and increasing the preservation of DM. This was demonstrated in a range of easy, moderately difficult and difficult to ensile forage materials. Sodium benzoate at concentrations between 250 and 2 500 mg/kg forage also has the potential to increase the aerobic stability of ensiled materials at a wide range of DM contents.
更多请见：<http://www.efsa.europa.eu/en/efsajournal/doc/2779.pdf>
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